Welcome from a fellow Trekkie (I watched the original series at noon hours home from school.!!)
I've never seen any themed material but it wouldn't be too hard to mock up applique ships or do them as a paper piecing exercise. Start with photos from the web sites and then there are books and comics that have lovely line diagrams.
Good luck. (Sadly my trekkies outgrew this obsession when they hit College and swtiched to gameing.)
MaryKatherine