If you’re prepared to spend that kind of coin, I’d look for other options. The P12 is too close to the A4 in its sonic nature, I’d say.
Have you considered a Tempest? You’re still in DSI territory, but that’s a rough and crude sounding machine that still plays very nice with Elektron’s gear. Sure, there’s a sequencer and stuff in there, which you don’t need as you say, but in the case of the Tempest, the sequencer is part of its sound.
Or perhaps a Slim Phatty? Compact for being a Moog, and again sonically something that plays well but still separates it from what you’ve got.
But the P12, I’d say, for the price, is too close to what you already have.