Ganesh - good on ya, that's what it takes for much of this old stuff, fab it from scratch
Steve - as Ganesh suggests, folks often find used parts to cut up for patches, with the complex shapes sometimes it's the only alternative - no available patches for a lot of things, Ray is very good for some custom "limited production" pieces, but he's the only one I've ever heard of, and if he hasn't already done that exact piece he needs a good original as a pattern
Bill