Please tell me that blue Pietenpol is still around. If I wasn't already poor from buying other planes I'd shell out a considerable amount of bucks just for the engine alone. FS60 open rockers aren't easy to find.
The blue Pietenpol is long gone. The engine is probably an Enya 40 4 cycle. The other beige Pietenpol has an OS 60 4 cycle with closed rockers. The open rocker type of engine occasionally comes up for sale on ebay. Do a search for what you want, then save the search. You will be notified when such an item appears. For example, the engine below is a brand new one. Click this
LINK to go to the ebay page. This auction ends in less that 24 hours. I am writing this at 2:30 PM on Memorial Day Chicago time.