Lisa---I started some Lavender Frost X Chief Chetzemoka seed last Spring, 2012. I got it from the NALS 2012 seed listing, item# 62-188 by Joe Nemmer (PA), so, right there, we know where at least one Lavender Frost is at--for hopefully some scales if nothing else.
For readers info--I started a few of Lisa's crosses last Spring and have a few more scheduled to be planted this Spring. My hope is one day I can return some of the best selections from these back to Lisa if she can find a special place in her garden for them.