I have been told personally by others who have used stainless handicapped railings, etc., on their boats that they not only work fine, but obviously saved a lot of money
. These aren't people I would consider unreliable.
As with many -- but not all marine solutions -- cheaper versions ARE available. My dad had an outboard
made by Sears (gamefisher). Needed a small part for it, price
was a very high $189.00. Noticed that the engine
was identical to one in a Sears lawn mower. Checked the parts
manual for the mower and, you guessed it, SAME PART, price
was $27. This was just a couple of years ago.
I, too, have found many very suitable parts
at Home Depot and Lowes.
I've also found some very bad substitutions. Keep your eyes open.