The Low Tide in a delay effects loops would sound super cool, especially with the LPG filter!
I can't recommend the Low Tide enough, and the parts aren't super tricky to find beyond the V3207D BBD chip (which is out of stock most everywhere). Fortunately, it's the same die as the MN3207 or BL3207, and you can find either of those on eBay or pedal-specific sites (I used the BL3207 & it sounds great). The other kinda weirdo parts are:
- LM258 - Can use LM358
- MCP602 - I think Tayda has them now, but also Mouser/Digikey
- A1M Dual-Gang Pot - B1M Dual-Gang is easier to find & works just fine
- 2SK208-Y - Mouser has 'em, but you can also use a 2SK30A-Y or even J201