The only Harvard kit I know of is the Flair kit
http://radicalrc.secure-mall.com/sho...50&cart=413373
It may be too small though

Specification. Type: Sport scale monoplane Span: 1675 mm (66") Weight: 2.3 - 3.2 kg (5 - 7 lb) Radio: 4 Channel Engines: .30 - .46 2 stroke .40 - .60 4 stroke Length: 1070 mm (42") Wing Area: 41dm2 (634 in2) Tail Area: 7.8 dm2 (120 in2)