If it is available at all, it would be through Seed Savers Exchange, a Membership organization. Canada has an extensive list of Irish potato cultivars, but this is not among them. The big question is Why would you want them. Their fame is due to their association with the Irish Potato Famine in the 1840's and it is generally conceded to be a miserable excuse for a potato.

you could check : Ronickers , Johnnies of Albion Maine, and also www.ARS-GRIN.GOV