It was $15 per backstrap. The company is Battle Ready Arms. Send the owner an email if you want to talk to him about work. I contacted a few other companies, but I guess the job was too small, so they would not even get back with me.
charles@battlereadyarms.com
As for doing them myself, I thin I will give it a try with the black P09. As for the OD green P07/P09 and the UG P09, I did not want to screw them up sicne the small back strap in those colors took a long time to get. I guess I could have practiced on the medium and large back straps, but I just sent them off to be done in the end.