Does anyone know where to find Mandevilla Vine seeds?

Does anyone know where to find Mandevilla Vine seeds?
I have looked and looked.
Thanks,
Robin

 

I have Mandevilla vines but never saw a seed on them Robin.I wonder if you have to get a cutting or roots?

 

Mandevilla Vine Seeds

I have read that cuttings are fairly easy to root, so I guess most do not bother with seeds. I erally wanted to try them from seed. I have located seed for the white form, but still looking for colors.
Robin

 

Mine are Pink but never have produced seeds.I have wondered myself why know seeds.