They can also tell you which suppliers have the best products. When I had mine done, the wholesaler the top came from supplies a lot of retailers. Can't remember the brand 23 years laVegas.
Top is still looking almost new. The plastic window lasted fine in Colorado, but broke out after 3 years after moving to vegas. Want to have a custom glass one made for my 65 at some point.
My upholstery guy custom made the well from making a pattern from scraps left over from the old well.