You can still get Win95.
E.g. [link|http://www.newegg.com/app/ViewProduct.asp?submit=manufactory&catalog=90&manufactory=1149|NewEgg.com]. They list 95, 98SE, ME, 2K, XPHome, XPPro, but not e.g. NT4.
I'd imagine it'll be a while before MS eliminates these options.
Cheers,
Scott.