I get mine from JP's Corner. Toll free 888-312-2646 or www.Jp'sCorner.com
The capsules are by metric sizes. But, if you state. The strike denonation $10-$20- etc. They will uaually know the size you want.
ALSO, state if you want direct fit or a capsule with a ring. Direct fit is the same size as the old style machine capsules. While capsules with a colored ring inside are larger.
The more you buy at 1 time the cheaper they are.
Dan