Youve described your main problem with WOZ pretty well, someone should be able to offer some advice. Current manufacturers should be helpful and prompt with advice and repairs for their own reputation as their market is now much more the home market not operators who know how to fix things.
Manufacturers though will be expensive so attend your local arcades and comps and you will find friends who like tinkering and in return you can help them.
Or try to find a local technician with reasonable skills and prices.
You're fortunate to have a bunch of great titles with lots to do on them so put the glass back on WOZ while you wait and play your other games.