Move if wrong section please

Ive searched the last 3 days to no success, I can not find the last bios update for my ibm pc 300gl. Does any one know of a specific site that might have it?
The current bios verison is: PDKT17.0

I recently installed a 600mhz PIII (from the 333mhz) and the bios sees 440mhz and says it doesnt have the proper update file for it.