Picked up 2 PCIe Sound Blasters for $10 each off Craigslist: an Audigy FX (with low-profile bracket), and an X-Fi Titanium Fatal1ty Pro. : r/ThriftStoreHauls
Original For Creative SB0880 X-Fi Titanium PCI-E 7.1 Sound Card PCI-E HIFI Fiber Port For Win 7/8/10 XP 100% Tested Fast Ship - AliExpress
Creative+SB0880+Blaster+X-Fi+Titanium+Sound+Card for sale online | eBay
Mod Creative Sound Blaster X-fi Titanium Fatal1ty Pro Series Pcie Sound Card Pc Audio Card Sb0886 - Sound Cards - AliExpress
Creative Labs Sound Blaster X-Fi Titanium HD Sound Card