Need help a replacement motherboard

Hello. I have a custom-built computer with a Gigabyte GA-KN8SC-939 motherboard with a Athlon64 3500+ processor. The motherboard had been having problems starting about a few years ago with random crashes occurring whenever devices were plugged in to now crashing and freezing up on a regular basis. I suspected it was the motherboard (no other devices were having problems, and the memory wasn't faulty), so I believe I need to replace the motherboard. However, knowing the age of this computer, I don't know if it's possible. Do you guys know of a motherboard that would have performance similar to this one and also work with a Socket 939 Athlon64 3500+ processor?

About the only place you will find a 939 board these days is ebay or at a computer shop that deals in used hardware. For less than $150 you can get an AM3 board Athlon II X2 and 4GB DDR3 If you want to go that route.
CPU: AMD Athlon II X2 250 Regor 3.0GHz
Motherboard: ASRock M3A770DE AM3
RAM:Crucial 4GB 240-Pin DDR3 SDRAM DDR3 1333

A setup such as this while not exceptionally powerful by todays standards, would run circles around that old socket 930 Athlon64 3500+ processor.