This is not the best forum to ask about fabricating the parts for a unique project. Canopys and cowls may be found from a similar size kit or similar units may be altered to suit. Wing manufacturing, SIG, and others have quite a selection that may be used as is or altered. Canopys are usually vacuum-formed. There are commercially available vacuum-formers or kits and plans to make your own. Cowls may be vacuum formed of fiberglass the latter usually being better. There are many threads on how to accomplish fabrication on the composites forum. For the novice it may be better to order one from the large selection at Stan's Fibertech or one of the many other fiberglass speciality companies.