Word of warning!
I bought a set of plans off Ebay for an Aerokits Fairey Swordsman and the quality of the templates was awful.
The copy of the Aerokits top and side views were fine as they were from the original kit drawings but the templates were very badly drawn/traced being unsymmetrical and inaccurate. The printing may "be to a very high standard" but the hand drawing certainly isn't!
They were so bad as to be unusable and I redrew them using a drawing program.
Fairly sure it was the same guy selling them, I'll try and check.
I think Canabus has the Sea Rover drawings?
Chris