Tip Plus carries WeThePeople, which also produces a couple complete flatland bikes. Well out of 'beginner' price range if you're paying retail but EP might not be so bad. There's the Sinus and there was a cheaper one in our Tip Plus catalog but I can't for the life of me remember what it was called now and WTP isn't showing it on their site so it may be either new or discontinued.

SBS stocks mostly Redline and BTI doesn't sell completes, far as I could tell just flipping through the catalogs when I had a spare minute today, so those are out, but check who your dealers are and what all they sell. The way that KHE frame design sorta revolves around the detangler (get it? Pun!) it's probably worth it to pass and just throw down for a DK through FlatlandFuel if your shop can't get anything else.