I'm not sure if this will help you out or not, but did you check the needle data base on ISMACS for the list of all needles and substitutions? If you know of a manufacturer that makes a substitution, maybe it will be easier to track down some of your needles??? Just a thought....
http://www.ismacs.net/needle_and_sha...edle-list.html
If this suggestion sucks... sorry. I'll blame it on being a newbie. Just trying to help you out as you've helped me out several times.