Deck Swap

[BrianX128 113]

I've got an old rider that I use primarily in spring, my back yard is littered with natural springs from a hillside and can retain water. I've got two French drains just in the yard horizontal dumping over a hill 150ft away to help but sometimes it can be terrible to mow. This rider I use for it is an old 1971 Lawn Rov'r, I've only ever found 2 others online. The thing is incredibly light, I can easily pick the rear end off the ground with 1 arm and I'm no big lifter. I recently rebuilt the old 12hp briggs I put in it, it originally came with an 8hp Tecumseh. 

 

 

 

My goal here is to put any other mower deck under this thing. Manufacturer doesn't matter, this little 36" deck is just a pain. 3 blades and all are small, all have 3 mounting holes, and the blades don't exist. I had to buy larger blades and back the ends off both sides and drill the offset holes. All the spindles have less than idea bearings and the deck is starting to rust despite the tractor having none. Probably logical since this thing mows in a swamp.

 

The deck has 4 mounting points, horizontal is 12" apart and front to back is 17" apart.

 

Does anyone have any suggestions what decks might be worth looking at? Outside of this thing I've only had wheel horses and finish mowers so I don't have any great ideas what might be similar. I like fabricating and can weld [poorly] when it comes to stuff like this, just hoping this thread sparks some ideas.