You’d likely have to wire it yourself, since there aren’t many (if any) out there in the wild. It’s not that easy, or fun, and you have to wire in the proper PCB/mosfets, etc to get the amp drain that you need, and then shrink wrap the whole thing. I remember when we mostly made our own packs way back when. It wasn’t fun, and I was very happy when Tim started offering the premade stuff.