Here is a petrol tap arm grommet for Vespa PX's 1985 on and T5's (not for mk1 PX's)
A Pair of Vespa PX EFL Disc T5 & LML 1984 Onwards Carb Air Box Top Screws
Vespa PX EFL Disc T5 LML Speedometer Drive 12T 12.5mm
Vespa PX EFL DISC T5 Complete Clutch Cable Grey Correct Type, Barrel End
VESPA PX EFL, DISC & LML PETROL FUEL TANK CAP RUBBER SEAL (TWIST ON CAP TYPE)
Vespa PX EFL Disc T5 Classic 12V LED Rear Light Insert Plates Reflector AC or DC
Vespa PX EFL Disc MY 125 150 200 12V Electronic HT Coil CDI Blue