After lobbying for somebody to hopefully do this stadium, I decided to just do it myself. The base is from Sean O's Wrigley Field L.A. After changing the walls and the crowd, and a few other things, it's passable for Seals Stadium. I had been keeping this to myself for a while but decided to put it out there just in case anybody else wanted. If anybody wants to improve upon this, please feel free.
Rename the stadium to a stadium slot in data/stadiums that you want to replace.
With this stadium, all the classic stadiums that were included in Oldtime Baseball are now available on the MVP platform.
Lates update has subtle crowd updates as well as changed seat colors from red to green. The small change makes a huge difference in the "feel" of the stadium. Hopefully more improvements to come.