I'm doing a similar search. I've got a Saito .45 and am looking for a suitable ARF bipe. So far, the only one is the WM Ultimate. I was hoping for something a little more "traditional", but not quite so docile as the tiger moth seems to be. The Sportsman Waco 30 would have been nice, but that's no longer available in the US. So far, no luck. The owner of the LHS said the small bipes are too troublesome on the ground, so nobody buys them.