Boat Cushions!
Apropos of Whatever, back a couple decades ago our friends with a Valiant 40 needed new cushions, before taking off on what turned out to be a 10 year cruise. The wife was good at sewing, but it was different work than her previous clothing background and a large project to boot.
They got lucky, admittedly, and found a custom auto upholstery shop owned by a member of their church. I visited the place when some cushions were done. Great work and the guy was not put off by all of the odd angles and edges of boat cushions. To him, it was easier than doing custom cars... (!)
They said his pricing was way less than the few marine canvas shops that had quoted them.
Perhaps it might pay off to get out of the marine/yacht vendor route and start looking at car shops for new cushions. Probably will not hurt, in any case.
When we had all of our cushion covers re-stuffed with new high density foam in 1995 and two covers reshaped, the price was reasonable at a small one man shop about 40 miles out of Portland that did boat cushions, canvas, furniture, and cars. His overhead was low, and his business was all thru word-of-mouth. He's long retired now, and moved away to travel around the west with his wife, on his converted RV/Grayhound bus!
Hope anyone looking can find someone similar, and affordable.