woody -
Probably not. You can glue it, sand it smooth and vac-u-form a copy, if you have access to a new or vintage vac-u-form, or, you can carefully glue it with liquid styrene cement and sand both sides with progressively lighter grits of sand paper, probably ending up with coffee filters, and then dipping in Future and hoping for the best, probably won't be perfect but useable.
Else you can just call the manufacturer and request a replacement part. Most current kits/companies are pretty good about it.
Archer out.