I think bending the stainless would weaken or break it. PVC should support the vertical load but during mast stepping the horizontal forces are strong enough that my stainless one's got a bend in it so I'd steer clear of it, bigger pipe should work but probably not be pretty. I've seen crutches made from 2x4s though.
My ideal project would be a double arch, stainless, as far aft as possible to allow the seat to still be opened.
As Moe said using two U shaped tubes welded at the top with a mast roller would be great and if fastened to the pushpits should be strong enough to hang off of. It's not a small project though unless you're the tubing bender and welding kind of tinkerer. Wish I could weld.
It would be great to be able to raise the bimini with the mast down, especially on the trailer, makes all the difference working on it. My cockpit stays clean longer too. It could also serve as a crane for a MOB winch, though you probably don't need that where you are. So...
15 minutes: Get Bill's.
1-2 man hours: Have a welder build a replacement, drop in place.
-or-
??? man hours: Design & fabricate the ultimate mast support and be the envy of all X owners. Then post the instructions.
