Repair or replace screen door 36' open

[sbw1]

Need to replace or repair screen door 36 open 2006.
Contacted Tiara, ready, they wanted $3000. Plus shipping.
How difficult is it to remove and any idea where to fix or replace. Thanks

My local marina replaced the screen and the vinyl beading on the edge. Both were worn. The entire screen comes out when you remove the fiberglass trim at the top of the sliding door. Lift the door out and then the screen. The piping slides into a track and the screen is repaired just like a home screen. Maybe three hours of labor and materials are nominal.