Another modest attempt. Madisound is a great source of drivers and other parts. Request a copy of their catalog and you will get a thick sheaf containing complete specs on a lot of drivers. Passive crossovers are a real bear to design. They have a large archive of speaker related downloadable software .
Descriptions are in catalog.txt .
Check out Box Plot. Parts Express . Get their catalog. Driver specs aren't as comprehensive as what you get from Madisound, but they have a lot of other stuff. MCM Electronics has a minimal web site, but has a great 770 page paper catalog.