anyone no how to get a CF-2025 Gear box?

I have a Exmark walk behind metro 1986 and i was trying to find a gear box for it online somewhere and most site have them not available. any information would help to finding a new one would help. I was thinking about finding another one and making it work somehow if thats my only option. the box has number stamped in it reading CF-2025

If anyone is in the same situation i figured it out the actual gearbox number to buy it is examark 1-302029 can be found on eBay for around 300.00.
Exmark or any dealers don't sell or carry it anymore but there reps helped me as much as they could.

Post complete model & serial numbers from mower data plate,thanks.