Here is a link to the only close to stock restoration done on a Trekker to date. It is complete visually, but has an aftermarket carburetor and air cleaner, the shifter boot is painted tan, and the front seats are from a later year Toyota. It is still the nicest Trekker restoration yet. It was done for the owner of the Toyota dealer that sold the Trekkers.
http://mecum.com/auctions/lot_detail.cfm?LOT_ID=SC0509-78944&entryRow=168