Where can one buy a replacement turn-signal lens?

Hello friends,

Where can I buy a replacement turn-signal lens for my EVT-4000e scooter?

I found one on e-bay for the ION (not necessarily an EV) but it costed around $10 for a mere lens! (not even the bulbs and the assembly). While at Advance Auto I get turnlights a lot cheaper but they're not of the right size, and I don't seem to find one for EVT-4000e....

Thanks,

Venky