I think I have some of what you are looking for. I definitely have some Handloader, G&A, and American Handgunner (I think). I need to get rid of them, but can’t bring myself to destroy them. I am located around Alexandria if you want to see what all I have.
Academy has a small sample of reloading supplies; some primers and a small selection of powder. Not aware of any individuals that sell supplies locally.
Out of curiosity, does your Model 40's seem a little sloppy on the rails? With very little movement the top end on mine rattles on the rear slide rails. You can make most Any auto loader rattle a little if you shake it hard enough,but mine seems excessive. Called Glock, but they blew it off as...
I've got around 25 lbs so I'm good for a while. I never tried Bullseye until a few years ago, but it lived up to it's reputation with 38 Special and 45 ACP loads.