Looking for reputable AND inexpensive canvas/enclosure maker

[Island Time O25]

Not sure if I'm posting in the correct section and not sure if the title's reqs are mutually exclusive but will give it a try anyway.

Looking for someone to make a straightforward full 4 side mostly plastic enclosure for a self installed hard top on a 36 ft sailboat over the winter. Not a rush job just looking for it to be decently made for not too much $$. The boat will be on the hard in Boston area from late October to early May. Any leads, advice or comments as well as ball park figure estimates to be expected are appreciated.