Vortex Sound Research

Hey! Im looking for a nice small (4hp) 5 step sequencer for my new rack. I've found the RYO penta, but it's a bit hard to come by. Its sold out everywhere except on synthcube, and PCB + Panel costs as much as the full kit on thonk (which is sold out).

Are there any alternatives I can check out? It has to be 4hp or smaller, that's the space I have. DIY is no problem, even though I'd prefer trough hole builds instead of SMD.