I bought one yesterday and got it assembled a couple of hours ago. It works perfectly with my GT200 with no modifications required.
http://www.harborfreight.com/automotive-motorcycle/lifts-stands/motorcycle-stand-wheel-chock-97841.html
Assembly and adjustment took about 15 minutes. It is really very solid and resisted serious efforts to tilt the scooter over. The third adjustment hole was too loose and things were wobbly, but the second hole is perfect. You can see in the closeup photo that there's still one adjustment hole for smaller wheels (10" maybe?). The whole thing tends to slide forward when putting the scoot on but since I placed it against a wall, that's no problem. It comes off very easily.
I MAY modify it later by drilling holes for the "wheel adapter" pivot about 8" closer to the "cradle stop" adjusting holes in order to move everything closer to the wall.
Using the 20% off coupon found in many different magazines, the final cost was $48 + tax.
⚠️ Last edited by tbates57 on UTC; edited 2 times