I have 2 very old Dell socket 7 pentium motherboards which apparently can't use a regular ATX power supply. I recently found out that these boards use a proprietary power supply. I have seen a few very old Dell power supplies on ebay that have the unique wiring (looks like a 20 pin ATX with an additional AT styled power connector). Has anyone seen any converter cables to allow the use of a regular ATX power supply with these old boards? I have looked everywhere but I can't find any and I don't like the idea of buying a 20 year old power supply. I would hate to trash the motherboards just because I can't get a reliable power supply for them.