What size grafting material are you talking about? I have 2 x 2 year old D. zibethinus and several smaller D. kutejensis. If they make it through this winter I'd be happy to give you some grafting material or plants.
I don't know if you've experienced this in Sarasota, but phytopthora just ravages durian trees down here in Miami, so these last remaining plants may not survive - even with weekly phosphonic acid applications. Durian doesn't seem to mind the temperature or the soil here so much, but the phytopthora is nearly impossible to control and in my experience it's nearly always fatal once they are infected.
I love me some durian, but I'm nearly to the point at which I give up on them. Phytopthora has me beat.
Scott