Most current data projectors can sync down to 15kHz horizontal, so you just need an adapter to change the 23pin connector into a hd15 VGA style.
Many amiga retailers still have the silver Commodore adapter in stock, but if you want, you can probably find the schematics at
www.hardwarebook.netYou might have to change some settings in the projector - mine for example insisted that a 15kHz signal in the VGA port was component video... I had to manually set it to RGB and store it as a user setting and then it was ok. Native PAL and NTSC screens work fine for me with just a silver adapter.
