I haven't found seeds anywhere either! Last fall I took a couple of cuttings but they didn't do anything. Haven't gotten a seed pod to mature either. Well, I did collect a couple but I am not sure the seed is viable. I should put them in some starter mix and see what happens. I still have one vine by my arbor I am hoping comes back this year. The other one I cut down and I don't think it will survive. They are in the legume family so I was surprised they came back at all. Off to see if I did save any seeds! I'll let you know!
Be forewarned, they travel a lot!!! One jumped from one trellis to the rose trellis. So my advice is put them somewhere they can spread. The flowers smell wonderful and are such a novelty! I think they are harder for the bees to pollinate, that's why you don't get a lot of seed pods.