For resource material for historical, gaming, whatever, here are some websites that I use often.
Partizan Press: Nobody does ECW better or have more “gamer required” information. Gaming scenarios, historical documentaries, rules, and even miniatures. For folks in the U.S. or Canada, use the link below to On Military Matters for Partizan Press items.
On Military Matters: I have ordered from them and they are very quick on the turn around. They also have sales on lots of stuff (minis, books, etc.) with a newsletter (worth getting IMHO).
Other ECW Blogs
I’m not the only gamer interested in the era. Here are some other good blogs/websites that has good/interesting info on the era:
Project Auldearn: Meet these guys at MCon 19. Super enthusiastic on the Scots during the ECW.
More links as time permits.