Ahh, correct on the CA preamp, I didn't look into it enough to realize the DPAs require true phantom, not just "mic power".
I have the Shure FP24, the rebranded MixPre running into my Korg MR1. It's a little tricky to use, since the Shure is not designed for high-spl situations and keeps wanting to send a really beefy signal to the Korg. I actually have 10db in-line barrel attenuators between the mics (AKG 460s) and the Shure, and again from the Shure to the Korg. This adds significantly to the size. Other TS'ers have pointed out that the Shure has a tape out and a tape return, either of which could probably be used to send a signal to my Korg that wouldn't require attenuation, but I haven't tried that out yet.
I like the Shure, and it definitely is built like a tank, but there are probably better solutions for a true low-profile rig setup. It sounds like the psp-2 would be the holy grail in this setting, but it also sounds like they are pretty darn hard to find. The Aerco looks pretty cool as well. The Sonosax size looks awesome, but I think it's the most expensive of the alternatives. I do know that Chris Church is working with someone else to design something that might fit this bill perfectly, but they haven't finalized it yet.
Good luck!
Mike