Jim's Hostas has a large seed list, and I think they ship outside the US, you would have to contact them to be sure. I never ordered from there so I can't tell you much about them. Also, the hosta library usualy has a lit of seed auctions in the fall.

jim's hosta used to sell them.. as well as the hosta library auction ...

but mostly in fall ... after harvest.. when lots of peeps are sowing under lights ...

its pot luck.. as to viability and result ....

some moms put out a high percent of streaked babes.. some a low %

pick a mom whose shape and leaf size pleases you ... rather than settling for just anything ... and you might want to stay away from sieboliana/tokudama.. unless you are willing to wait the 5 to 10 years for them to mature ... to see what you really got ...

in your tiny garden .... its not like you are going to want to have 100 giant types and wait 7 years ...

ken