Not sure if your trying to display your C64 video output on top of a Workbench screen or just trying to display your C64 on a monitor that cant handle 15Khz...
This company supplies solutions to both, I have bought many item from them before and they only use the highest quality components (hence the high prices) but I've tried many such products over the years and to be honest you be hard pushed to fin such items that give you a better quality output...
Keene Electronics(PS: you'll have to look around their site cos they've recently moved all the categories about...
