Might see if you can find one at a junkyard or check out a good hardware store that carries parts for sliding glass doors and drawer glides and things like that. See if something they have is the right size. Otherwise, can you measure the inner and outer diameters and width of the wheel? If so, should not be too hard to find some round stock of the right size and cut off a piece for a replacement wheel.

r.c.brown@ieee.org
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Project: 4Crawler
4Crawler OffRoad - 4x4Wire discount code