Yes, the Mower Place sold me the right belt, (1/2"x86 od, 84 id)Rover #A12859, the equivalent GA Spares #BEL6886.
After dropping the cutter deck I could see why i no-longer had reverse - the drive belt had jumped off the front motor drive pulley and was sitting on the smaller diamter pulley shaft between the drive and cutter pulleys. What ever caused the pulley to jump off also took a huge chunk out of the plastic idler pulley, (#A08585) so it was handy having the parts list there on a Saturday afternoon ringing around to find a shop that was still open and had one in stock.
I also noticed that the cutter deck brake block (#A10566)had worn right down to the metal backing plate on the leading edge, so I drilled out the rivets and rotated it 180 degrees and re-rivetted it back on.
cheers.
