Have you got a manual for your machine Marty ?
Here is where you will find it ;
http://www.ipdb.org/search.pl?any=last+action+hero&search=Search+Database&searchtype=quick#1416Here's some light reading for ya -
http://www.pinrepair.com/de/index.htmYou should be able to find the part numbers in the manual.
When should you install a flipper kit ? - If the flippers are strong and you can make ramp shots - you can leave them "as-is".. DE Flipper kits are expensive, but you can buy plunger & Link / Coil stops.. Check the EOS as well... Some of the route operators did some weird stuff to keep these games going !
Owen has a great guide on DE Power Supplies in the Tech section.