I am looking to do the same thing to the CnC I just lopped.
FG is still under patent, but I would not be opposed to approach grafting, but that would mean seeking out an already grafted one which is far more difficult than getting the budwood of an off-patent but similarly appreciable variety.
I've already decided some of the tree will be an apricot. Maybe there are some similar low-chill pluots that members of this forum could recommend.
Yes Oolie, thanks for the added info, I was thinking maybe the OP needs to go get to purchase the tree instead, thus providing multiple potential scions, since OP likely needs to do multiple grafting on the multiple sprouts that would normally come out from a topped tree. The concern that we have in SoCal is the chill requirement of the FG; Dave Wilson site says it needs 500-600 hours, but I see OP said this is for Santa Barbara region, which is further North than LA/San Diego. My tree is still young, in fact it fruits the first time this season even in my less than the chill requirement specified above, so Santa Barbara's location should be an advantage in this department.
Just for and added note, I even regard the FG flavor to be even better than the rave reviews of SpiceZee nectaplum: a lot juicier, sweeter and as the name implied "imploding" flavor like a grenade, as one magazine described it...
(I didn't bother typing more earlier since it was awkward to do so on a tiny smartphone screen...). By the way, I still can't figure out what CnC stands for, it shows I am still a newbie...
Correction: Double check the chill hrs. of FG: "300-400 hours below 45°F" Samu 09/11/19