None of my PCs have TPM, but they have a 20-pin connector to plug a module into. Yeah, they're 7-10 years old and run great for my uses.They now demand TPM to be present and enabled. I did some checking and anything from the last couple years from AMD and intel have it on the chipset level, but turning it on will mean it will break dual booting for Linux for a while and make things overall difficult.
A quick look found different 20-pin pinouts, plus modules with 13, 14 pins. Looking at maybe $40-$69 min cost--but can you trust them? (pun intended)