Hello, Kris...
I join your search for Leucogenes leontopodium...because I don't have a copy of it anymore at the moment. The only source of supply in the past was Rob Potterton Nursery. But it hasn't been in the catalogue for two years... unfortunately. I hope that it will be available again sometime. 🤞
In the appendix Leucogenes neglecta... very similar...only slightly pointed leaves...and possibly hardly cultivated at all.
Cheers
Thomas