For research motors. I really can only use them if the throat is < .5" or so. If you've got one or more that you haven't thrown out yet, I would happily pay shipping. I could also use the delay bulkhead.
The forward closures are easy to turn around. Scrape out the burned stuff, plug the "touch hole" with clay and pour in your smoke. It's also easy to turn them into a threaded FC too.
Dee, We'll see if Santa is going by your place this year!