Jeff,
I haven't seen any Galanthus seed in the U.S. or Canadian donations last year; and I don't remember seeing it on any of the seedlists including: HPS AGS, PBS, SRGC, HPSMAG, and NARGS.
I know that some seed exchange participants in all those clubs grow Galanthus. Perhaps the seed is too ephemeral to withstand the time it takes to complete the distribution cycle.
Many Amaryllid seeds have a very short viability, or will germinate in transit without light or water.