Not 100% sure what i ordered will work/be compatible with my gear, but fingers crossed. All from eBay:

2x Emulex LP100000 PCI-X 2Gb Dual Port Channel Fibre Card (intended for my Dell Poweredge 2950s)
2x Linksys MGBSX1 Compatible SX SFP Gigabit Mini-GBIC LC (intended for my Linksys SRW2024)
1x EMC AP-7420B Fibre Channel router (although described as a router, i’m hoping it will function as a switch… 16ports @ 2Gb)

I’m still looking for the cheapest cables- looking at ordering 2x 1M, 2x 2M and 2x 3M to begin!