we were quoted at the dealer in phx this summer when shopping a sewlong bimini as a replacement on a supreme/centurion was roughly a 2k premium on top of the manufacturers original bimini that we were quoted $1800. they told us to plan 3500ish +/- with discounts. this was dealer/sewlong doing all the work.
difference in coverage is night and day tho and dealer said sewlong quality of stitching and materials was much better than factory.