Here is the first one, (both are 18")
Flik Wasp, comes in Silver, Anthracite, or black
Only negative: 7.5" wide, not 8.5
Flix Arctic, same colors, but 8.5" wide
The width shouldn't be that big of deal, since I won't be on the track. BTW the wheels are $188 USD each, and weigh approx 19lbs each!