Another option could be laser cutting of stainless. (or aluminum) For those of you in the PNW, we use..
3979 Hammer Drive, Bellingham, WA 98226-7630
we e-mail them drawings and they send back parts cheaper than we can make them in our own shop. I don't know how they do it, but I'm sure glad I found 'em.
These tiller plates were $10 a pop, including material. And that was ordering just 4 of 'em. Not like we're buying hundreds to get the price down.
So if you need plates for this or that, it may be an option?
Also, a trick for making fiberglass panels. We wax up a formica table, spray white gelcoat, then lay up the panel. When you are done you get a fiber panel with one side that looks -exactly- like white formica. This works really well if you are going to see the backing plate from inside the boat's cabin.