Search of old Zantedeschia selections

[Uli]

Dear All,
Does anybody know of a source, or does anybody still grow two old compact selections of Zantedeschia aethiopica? One is called "Little Gem" and the other one is called "Perle von Stuttgart" which was raised in 1898 with Little Gem as one parent. I would be more than happy to refund postage, pay for a tuber or exchange with material from my collection. Please contact me privately if you can help.
Thank you very much in advance,
Uli