After he sold the TechnoPower brand some time ago to Elmer L., Wally later started the Replica engines brand which included 1/4 scale Gnome rotaries, an Offy, ford flathead, olds aurora, Harley knucklehead and another 8 cyl vee motor of which the name escapes me at the time (shame on me!)
His son, Scott still runs the replica company today too selling the gnomes and auroras.
Wally also built a 4 cyl 1/4 scale fairchild caminez too, but I only know of one in existence. (I think that Paul knapp has it).
That should be a good purchase, that 5 cyl!
OK... It was an OX-5. That 8 cyl.
Here's a very nice article about replica engines....
http://machinedesign.com/article/gullivers-engines-0622