Fin suggestion for a 9'6 Coreban

Hey guys, wifey here of Jason - I bought a quad set of Gerry Lopez Future fins for his board, long story cut short, I took the smaller rear fins and put them on my 9'6 coreban with a three fin set up and they totally changed the way my board handled - alot more stable on both the wave and in choppy water.

Idiot me loses one of the fins at Noosa the other day and I've had to put my standard coreban fins back into the board I really miss my future fins .....

I've searched high and low for the one rear fin to replace the lost fin - and I've had no luck, apart from re ordering a new set can anyone suggest anything else that maybe similar.

thanks in advance
Fenna