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.
HS6 is common in 9mm Major, can't say I've heard of anyone using HS7.
That said, I use HS7 in my 10mm so if you decide to part with what you have, I'd like to work out a deal with you.