Benny,

If you're in the US there are several shops that could supply you with the brass. Mike Schrank's Smoke N Gun in Waukegan IL recommended Aardvark Arms to me about two months ago when I asked them about obsolete calibre ammunition for a friend in India. Mike also told me that their gunsmith David Norin chambered a number of guns these days for many of the old chamberings and that they worked with Aardvark for loaded ammunition as well as for brass. No idea where Aardvark get it from, but they should be able to supply it to you.

Best wishes and good hunting!