i found some very good ones on piston heads for 260! i cant post links on work pc but if you go into parts and accesories then refine the search by putting a3. cant rember make off the top of my possibly head spaxx? i think they cost about 500 new! but i have seen a few threads around! i wish i had seen these last month before i saw mine!
MODS - these arent mine just thought they were a good find