Wachsmann,
If you want a product don't wait for stores to have it, go find it on the net. The real deal is there is a huge demand.
Last year I called Hodgdon directly and asked for Retumbo . They produced the names of several of the large distributors. The distributors in turn told me of individual shops that had the powder. It was just matter of calling the shops till I found one that would sell me more than a pound and also be willing to ship. I now have Retumbo.....
As for Rum brass either buy Nosler or pull bullets from Rem loads.
The solutions are out there.