Saudi Arabian operated 737-200s before the MD-90. They didn't even get their MD-90 sims until a few years after they took delivery of the airplanes. All training was conducted by McDonnell Douglas ( Boeing ) instructors in Long Beach for the first few years.
All the vintage airplane sims were being collected by the second/third tier training centers in places like Miami. McDonnell Douglas ( Boeing ) didn't even have a DC-9 sim after the early 90s.
Typhoonpilot