J Hudson lists them for $2. for a seed pkt.
I do see mention of Mr. Decker, being associated with Ipomoea tricolor 'Wedding Bells', dating back to 1962.
Why not just grow several seeds ?
You can often learn some things about a plant, by growing it, that you wouldn't find out by otherwise only having read about it.
(I get some odd, "you've won" & confetti, just trying to read it.)
