Quoted from phil-lee:

The Pinball Resource is the master supplier for Gottlieb, figure out your part numbers if possible and send your order by e-mail. Pay by check when the parts arrive.
Order a new rubber ring kit, a few boxes of bulbs at a minimum.
Look at ALL coils to determine if you need any replacements.
Good idea to get a switch adjustment tool, a points file/Flexstone, and a bottle each of Novus 1 and Novus 2.
That is a clean looking machine inside.