Skirret- where to buy tubers from?

I have searched and I can't find them from the locations I trust so does anyone know where to buy some skirret tubers from?  I'd prefer a good variety so that makes it even harder to find.  I have seeds but can't seem to get them to grow but I'd also prefer my first plant to have the good traits (no woody core, sweeter, bigger tubers, etc).  And then to use clones until I have a good population to eat off of and then try seeds for breeding attempts.

You've scanned through the seed and plant resource grid I take it?
I'd send you some, but since I'm UK based that might not be the best idea... I think the woody core is mostly caused by growing conditions. Mine are almost always coreless so I think they like it cool and damp. In warmer areas I think growing it in a shady boggy garden may give best results perhaps. Mine don't tend to set seeds very often. I did get a very few last year which was a bit drier than normal, I can send you those if you like? I was planning on sowing them myself, but really have plenty of plants by division.


previous post on skirret

Thank you so much for the offer, Nancy.  I have seeds from good sources so I'll try them this year so please keep yours.  Now, if these don't work I may send you a different message next year if you don't mind, lol.  I've researched and others suggest a similar thing about the woody cores being connected to lack of water.  But as everyone knows the internet can be contradictory and wrong so hearing it from your personal experience will make me water more if they germinate.  And that is especially true if you use your seeds so if I can get them to grow I'll post about the experience.  I mostly grow drought tolerant, apocalyptic-ish surviving plants so I don't have to do much because of time constraints.  Thanks again for the offer and reply!