The only engine I know of that might be a good match is the RCS 140 from
www.rcshowcase.com. That's what I'm putting in mine. I wish it was completed already, so I could tell you exactly how it does. I've attached a small picture below, and more are available on my P47 page:
http://astro.umsystem.edu/andy/rc/p47/
Andy Steere
Mid-Missouri R/C Assoc.
http://astro.umsystem.edu/andy/rc/