http://www.cambriandirect.com/ they have one:
Long 'Midget Mustang'(CA19)

Designed loosely by the Chief Engineer of Piper Aircraft around the lines of the famous Psi D fighter (North American inc. complained about the name) the Midget was a stalwart competitor in the early days of the 'Goodyear' races. The kit contains: Obechi veneered foam wing panels tailplane and fin. Pre-cut ply and balsa parts. All clevices, horns, control cables ect. Formed, wire undercarriage. Moulded cowling, canopy and wheel spats. Fullsize plane and instruction book. SPECIFICATION: Wing Span 1.4m (55.25") L.O.A 1.1m (44") Wing Area 42 sq.dm (652 sq.in) Av' Weight 3.4kg (7lb 7oz) Wing Loading 27ozs/sq.ft. For .61 two stroke motors and four funtion radio.