A new update for the Kung Fu Flash was released last month. It is a flash cartridge for the Commodore 64 that runs CRT, PRG or D64 game formats amongst other useful things. This version improves disk emulation to support saving high scores in Lode Runner.

You can find out more about the Kung Fu Flash v1.48 update here. If you want to buy your own cartridge I highly recommend The Future Was 8bit where I purchased mine from.