From the same designer in 1/35th, $23.71 for the set of four:https://www.shapeways.com/product/46ZY6C5EV/track-set-for-wheeled-vehicles?optionId=63206700&li=marketplacePersonally speaking I think the 1/24th scale track assemblies would look better on a 1/35th vehicle,especially if doing a halftrack.
There's also thisBut I'm not sure I want to borrow that setup; it's too big.