Vintage Computing Build Parts Search

[iggy12345]

Budget (including currency): $500

Country: United States

Games, programs or workloads that it will be used for: All of them, this had better run Crysis when I'm done

Other details (existing parts lists, whether any peripherals are needed, what you're upgrading from, when you're going to buy, what resolution and refresh rate you want to play at, etc):

Things I need help finding:

• Power Supply
• The weird brown 3 slot riser board
• Graphics card
• A second pentium pro cpu (that is < $100)
• vrm board
• hard drive (or maybe some sort of adapter to allow the use of a more modern drive)
• ecc edo unbuff dimm ram
• cpu cooler

Things I have found:

• RAM: https://www.ebay.com/itm/64MB-EDO-MEMORY-RAM-ECC-UNBUFF-60NS-DIMM-168-PIN-3-3V/162792030949
• Riser Board: https://www.ebay.com/itm/Compaq-Riser-Board-247392-001/264232222969?hash=item3d8577c0f9:g:Ou4AAOSwTspfcFJZ
• Ribbon Cable: https://www.ebay.com/itm/24IN-IDE-Cable-IDE-Dual-Drives-Ribbon-Cable-40pin-for-CD-DVD-Drive/112614553269?hash=item1a3859b6b5:g:qY4AAOSw2s5dpJT1
• Ribbon to SATA Adapter: https://www.ebay.com/itm/3-5-HDD-IDE-PATA-to-SATA-Converter-Card-Adapter-for-IDE-40-pin-HardDrive/254687328053

I'm looking for people that may have extra parts, or know where I can find them.

I could also use advice on how to get an OS up and running, I'm planning on doing a server version of linux, I'm probably going to self-compile the kernel so that I can get memory efficiency that I'm going to need to get it to fit into the 256 mb of RAM