O.K. Mskitty, I'll root some of my variety and I'm sure other members here have some to trade or sell as well.
The plant is evergreen in the tropics but defoliates like a decidiuos tree with temperatures in the mid-35 F range. Mine is currently budding out from such an episode in January. It's supposed to need a frost-free zone, but hey -- my last name is Frost and it's doing just fine! But all jesting aside, many of the tropical guavas will survive a few mild frosts. Prolonged temperatures below 27 F will kill the plant to the ground, with some possibility of regrowth. If the roots freeze the plant is gone for good.
Supposedly the tropical guava only grows 10-12 feet high north of Florida, but my friend in San Marcos CA has one 25 feet tall.
Here's some more information:
CRFG Tropical Guava Fruit Facts