You could try to find an up-scan converter that would work. I think you're out of luck though, the horizontal refresh rate is just too high. Most up-scan converters take 15kHz and put it to 31kHz, a few (ie the really expensive ones) will give options for resolution and refresh rates in the range of a normal PC monitor, and at 800x600 with a vertical refresh rate of 85Hz my PC monitor only uses 53.1kHz for horizontal, so I doubt you'll find one that works.