There isn't really any "one" list, but, you can find most of them that "openly" provide by just checking a few websites.

Pam Peaks:

http://www.pamelapeaks.com/Data/TalentEscortServices.htm

The Luxury Companion:

http://www.theluxurycompanion.com/

My Platinum Provider:

http://www.myplatinumprovider.com/providers.html

Body Miracle:

http://www.bodymiracle.com/

And then some are listed under more than one.  Then some are also independents.  But, if you check those four websites, you will be able to find a majority of pornstars that provide openly.  And some of them are listed under multiple agencies.  For example, to make this easy, lets just start with someone whose name starts with an "A" - how about one of my favorite porn stars, Abby Brooks.  She is with The Luxury Companion, My Platinum Provider, and Pam Peaks.

As a matter of fact, here is a picture of Abby at work right now!!   Good luck with the search



For example,