I've searched, didn't find anything

I've got an Ultegra 9 spd. system, with the Ultegra triple crank. Maybe the 6500 group, not sure.

The middle ring is done and needs replacing. Odd thing is all the reading I can find tell me this was a 30-42-52 crank, yet I've counted the teeth on the middle ring and it's a 39.

Thus I'd like to source a replacement, but need a ring with the ramps and pins to allow the system to work correctly.

Any thoughts on a source for that ring, appreciated.