Here is a consolidated list of links that you will find separately in each Camera Video link above. Each of the Camera Video posts has (will have) a list of camera specific accessories (film type, or, camera specific batteries, etc), so, try there for more options.
Click here for Digital Camera Specific Accessories
Or, here for General Film & Digital Camera Accessories
Or, here for Polaroid & Instant Camera Accessories
Camera Film & Processing
35mm Film & Processing
Try 
– with their ‘Passion for Film’, Analogue Wonderland offer a quick and efficient service to process your 35mm film.
APS Film & Processing
Try 
– Established in 1954, DS Colour Labs Ltd can process APS film cartridges.
120 Roll Film & Processing
Try – with their ‘Passion for Film’, Analogue Wonderland offer a quick and efficient service to process your 120 Roll film.
126 Film Cartridges & Processing
Although no longer made by Kodak, you can buy out of date, unused cartridges from eBay – see what’s available HERE
Try – Established in 1954, DS Colour Labs Ltd can process 126 film cartridges.
127 Roll Film & Processing
Try – with their ‘Passion for Film’, Analogue Wonderland sell a variety of different 127 films.
Try – with their ‘Passion for Film’, Analogue Wonderland offer a quick and efficient service to process your 35mm film.
620 Roll Film & Processing
Try – with their ‘Passion for Film’, Analogue Wonderland sell a variety of different 620 films.
Try – with their ‘Passion for Film’, Analogue Wonderland offer a quick and efficient service to process your 620 film.
828 Film & Processing
828 Film is no longer made, however, you can find expired date film on eBay HERE. Or, here are a couple of links on how to use 35mm film in 828 cameras. Daniel Mitchell Photography & Art Deco Cameras
Try 
– John Salim is a member of the British Institute of Professional Photography (BIPP) and the Royal Photographic Society (RPS) ‘encouraging higher standards in photography’ and has worked in photographic processing laboratories since 1980.
Disc Film Cartridges & Processing
Disc Film Cartridges
Although no longer made by Kodak, you can buy out of date, unused cartridges from eBay – see what’s available HERE.
Disc Film Cartridge Processing
Try 
– MS Hobbies can process disc film cartridges.
Digital Camera Specific Accessories
Memory Cards
If you need an XD Picture Card memory card, here’s a link to Olympus 2 Gb XD Cards. You can also try eBay for those – Click HERE
Batteries
General Film & Digital Camera Accessories
Wrist & Shoulder Straps
A stylish shoulder strap is always a good investment. Here is one from Amazon. Or, See what straps we have for sale here.
Camera Bags & Cases
Need a case for your compact film or digital camera? This Black Hard PU Leather case should do the trick. Check the size of your camera before ordering (Size: 12.4 x 8.0 x 5.0 cms)
USA Gear Compact Digital Camera Protective Case Sleeve Pouch with Wrist Strap and Accessory Pocket, Scratch and Weather Resistant – Compatible with Canon, Sony, Nikon, Panasonic & More (Size: 11.5 x 6.3 x 3.8 cms)
Here is a nice canvas vintage style bag from Amazon that will suit. Or, See what bags we have for sale here.
Here is a great Amazon Basics one that should do the trick. Or, See what bags we have for sale here.
Polaroid & Instant Camera Accessories
Instant Film
Polaroid Photo Album
Camera Bag
