Did a little digging on CL this morning and found the Let's Go Aero company which seems to make some pretty interesting options. The big question is how tall is your scooter? Here's an option that may work, it's still pricey but a lot nicer and still less than the plastic box you posted earlier:
http://letsgoaero.com/ProductDetail.asp?Pid=106
They're based out of Colorado Springs so maybe you and Dave could just go pick it up to save on shipping? Isn't there a Colorado meet under discussion?
Here's another option they offer but it won't work for you out of the box because it doesn't have a ramp. However it is small, light, aerodynamic, and might be just the right size:
http://letsgoaero.com/ProductDetail.asp?Pid=29
Now normally the $3K price would make this not even an option, but I stumbled on this steal on CL in Atlanta:
http://athensga.craigslist.org/bik/3392572411.html
At $500 maybe you could buy it and get someone to install a custom ramp?
Good luck!