Debbie, the diving board situation in California is challenging, but not impossible and not nearly as hard as most people believe. It is true there is a great deal of reluctance on pool builders' part, for understandable reasons. I find that they want to blame someone else for not putting in diving boards - "the city won't give you a permit, you can't get homeowners insurance, etc." None of that is true, at least not in my town - diving board was in my plans and for the permit the city was very interested that the rebar and bonding was done properly, but they never said a peep about the board itself. I told my homeowner's insurance about the board when I bought the house - no issues. This does depend on your homeowners company, it is true some won't insure you if you have a board. I use State Farm. If your insurer has a problem with boards, switch to State Farm (they are not the only insurance company without a problem with diving boards, just happen to be the one I use).
Now, back to your immediate question. Most of the pool builders I spoke to would not put in the board themselves and take responsibility for it. Only one, if I recall correctly, refused to have anything to do with my remodel if I was replacing the board. Most of them proposed some combination of what they would do and what I was responsible for. Some said they would pour the concrete for the base, but I would have to set the jig in the concrete myself and attach the board to the jig. Some said I would have to find someone else to pour the concrete. The pool builder I used said he would pour the concrete AND set the jig, or base, and I would only have to bolt on the board myself. I went with U-Frames, which means I only have to attach two bolts through the board and back frame. No sweat.
I think if you ask around, you can find a pool builder willing to do something like this. If you can't, I suggest you call SR Smith and ask for a referral to an installer near you. You may need to use one contractor for you pool build / remodel, and another one for your board installation, but you can get it done if you want to.