Rox,
I had one when Suki first introduced it, I think it was 2005. It does perform in cooler temps. I gave mine away in 2009, as I was thinning out my collection.
As for Trop Nat, the website is gone and the owner does not post on any forums anymore, though she does have a FB page.
Originally TN was run from her house in Ewa Bch, then she finally bought a house and moved to Waianae, then ran the website for couples of year and then poof gone, other than a few rumors that were circulating around as to what happened at the end.
I know that Matt aka onestopaloha on Ebay, carries many of the same varieties like Bonnie Fox, Wave Rage, etc. Fuzzy Moody aka Blooming Plumerias also supplied Trop Nat with some of her stock that she sold so you can find some of the same varieties in Bloomingplumerias Ebay store. From 2001 to 2006, I had purchased a ton of stuff from her but only have 3 of her plumies left in my collection as I gifted the rest away.

Hope this helps answer your question.

I love the beautiful color!!

mahalos freak4plumeria...after waiting so long for blooms, wish they would be bigger! Were yours small too? roxanne

Rox,
My plant bloomed the 2nd season I had it and initially were small, but later flowers got bigger and with the drooping slight curve to the petal like Suki's.

May not be warm enough now, might have to wait till Aug/Sept.
Congrats