Quoted from edward472:Flippers has one but it's pricey: https://www.flippers.com/catalog/product_info.php/reversing-motor-rifle-game-p-4842
I'd call Steve at PBR and get a quote on him fixing it.
I had Steve at PBR rebuild my 1969 Williams Phantom Gun motor and it ran around $100.00 + shipping both ways.