Shane, What year is your Pacer? It has the round rear window so that makes me think 55' or earlier. Does it have a back door on the pilots side or was that a later option? I have seen rear doors but only on square window models which I think started about 55 or 56.
Give us some particulars about your plane and you might generate some interest from one of the TriPacer fans out there. MegaMang has voiced interest in building a Pacer version when his TriPacer is flying.