Hi jet2us,
I know you looking for B737-200 engineers however i'm a LAE on B767 & have also completed mechanical type courses on B737-300/400 Classic & B737NG
Have done Line Maintenance & overnight hangar A checks on B737-300/400CL & B737NG so i know a reasonable amount on these type.
Kangan Institute TAFE in Melbourne Australia (Broadmedows Campus) have a working B737-200 aircraft which is used for Pilot, apprentice & engineering training. You can have a look on their web site & maybe make contact with them. They may have a B737-200 instructor/engineer that may be able to help you.
I'm based in Australia so if i can offer any asistance let me know. Even if its via email or phone.
Chock Chucker.