We had some discussion of this a while back. When you throw around terms like "available" and "reasonably priced", I think the answer becomes: "NO". ...and as I recall, the $200 or $300 solution someone brought up, wasn't anything I'd put a 6' dish on, either!
I've mentioned this in the past: I would like a USALS controller to hook to a stock H-H BUD motorized mount. Right now, I'm afraid the best solution is either an H-H or screw-jack motor, combined with the very nice Gbox v3000 from Sadoun. That's what I'm hooking up, and if there was a better solution, I'd be using it!