By the way... I live in Southern California about 10 miles from the Pacific Ocean.

I'm thinking this hybrid is tasconia type, so you'd need pollen from another tasconia, such as p. mollissima or the like. My climate gets too hot for tasconias--August hits and they all die--so I'm afraid I can't offer any additional advice. Hybrids sometimes are more difficult to pollinate, and some are even sterile, so you may be facing those problems.

If all else fails, you could try bud pollination. I've never had success with it, but essentially you collect fresh pollen from an open flower. Then you manually open a bud that is on the verge of opening the next day (it's pretty easy to tell) and use a soft brush to apply the pollen, then let the petals close back up to open normally. The chemical blockers that prevent self-fertilization are supposedly not active yet, so selfing is possible. Like I said, I've never had success with this, but others have.

I have never seen a fruit on P.'Susan Brigham', but that does not mean it isn't possible. Being a hybrid of P. mollissima and P. mixta, both from subgenus Tacsonia as jblaschke stated, another Tacsonia type would be necessary to produce fruit readily. Even then, you will likely need to hand pollinate it. You have a beautiful Passiflora, but not the best for fruiting.

I have one that I planted a year and a half ago. It started flowering last fall. And this year the flowers are turning into fruit which surprised me. I notified the nursery asking about the fruit and they sent me this link with this question. So I signed on just so I could let you know that my Susan Brigham is bearing fruit.