Hello Jose,
Not following you when you say "I have this working with FA but I cannot find how to do it in a SPB switch."...do you not have an FA Proxy switch and FA Server switch set up? if you do, then the FA Proxy switch will communicate the required VLAN:ISID mapping upstream to the FA Server switch. Or perhaps you have SPB to the edge? which switches are involved here.
Just as a reminder to all readers, ExtremeControl also fully supports FA.
Thanks!
Shmulik