Got this on eBay a brand new a EasyFlash Cartridge pre-built kit for the Commodore 64 computer or you can buy the kit and assemble it yourself. It basically allows you to flash a .crt image file to the cartridge as many times as you like. So if you have all your old games on .crt file you can now experience it on your real Commodore 64. You will need a software running on your Commodore 64 to flash the image file, to find out more about this device and the software to use it go to EasyFlash web site.
Where to buy:
eBay Seller mikebetz42
Retro Donald Shop EasyFlash Kit without housing.
Retro Donald Shop Cartridge Housing.