Now don't laugh. A co-worker said he ran across a site once that had them and we cannot find it now. Imagine using photoshop for make-overs swapping out already clipped hair. How wonderful would that be :)

Try googling Hairstyling Software or Online Hair Imaging or Hairstyle Database

I got some unscientific results but this may be what you're after:
http://www.hairresources.com/page.asp?page_id=94
http://www.hairresources.com/page.asp?page_id=93
http://www.hairresources.com/page.asp?page_id=92

Also found this ...
http://www.vendistyle.com/about

and this...
http://www.thehairstyler.com/

and this
http://www.makeoversolutions.com/MOS/index.html

Close, but I guess I'm looking for something more like photo objects or stock photography. Hi-res at full size, no less than 300 dpi. I might have to make a set myself :(

Just an example of what can be done Photoshop'ing

http://www.newdo.com/

Sean :wavey:

Not the Hi-res images you are looking for, but worth a look for the variety of styles, cut etc. ....

http://www.internationalwig.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=DESIGNER
http://www.acewigs.com/
http://www.wigs.net/index.html