I live in Milwaukee and have at least 5 lp sources for used and new releases. I remain pleasantly surprised at the selection of NEW titles released. Weekly, releases of progressive rock come available. Also, some pop; occassionally jazz and reggae re-issues; a spattering of soundtracks. Check out this website: http://www.atomic-records.com/
As others have suggested, search the internet. And your local record shops.
As others have suggested, search the internet. And your local record shops.