Ken & Steve over at barebackcity.com used to have a lot of videos that they sold before Visa / Mastercard cracked down on adult / high risk credit card processing.
As far as legal - yes. It is legal to shoot bareback porn. To one extent, it is just another turn on or fetish like watersports, fisting, etc. (read that again before y'all start to rant please
) And felching just as you described.
Hot Desert Knights is one seller of them:
http://www.hotdesertknights.com/
You might also want to check out
http://www.kinkvideo.com/ (not too many if any there) as well for some other videos. And also
http://www.treasureislandmedia.com/tivideo/ And even one more:
http://www.westhollywoodvideo.com/si....Asp?CatNum=20
When I go to Internext (it's the adult webmaster's convention) there is at least one seminar for the gay industry. The seminar is very different from the others & it is not videotaped to be shown on the website. It is almost taboo still. If there is a demand for such a video - you can bet your life that people will supply it.
I am not in the "industry" - just know a lot of people who are. Plus I keep up just because of what I actually do for some what of a living.