I have never tried getting a provider as a SB. I have played some with SA and have had good luck with it. I live in a College town and there is a lot of lil Coed's looking for a Daddy. last year I played hard on there. I know I saw the girls like I did providers but I networked with some other Daddy's and most all of them have one SB and it a lot like having a GF.
I know if you work it right you can make the arrangement the way you want it.