I've got a bunch of straight dolly track for sale. 8' sticks, chrome is in good shape and they lock together well. Standard 24.5" width.
I think the brand is Matthews. The one I pulled out of storage didn't have a logo on it... go figure!
Asking $250 per stick. I've got probably 20 (some sales pending, so who knows).
They're pretty heavy. I don't think shipping would be worth it, but I'm happy to try. Located in Los Angeles.