BX 1830 Parts or Parts?

[Dangerkitty]

Are there any lists anywhere that have interchangeable parts for the BX1830 with 54 in deck, that will work from a similar Kubota? We are working on the mower deck gear box for the BX on the property. Excuse my lack of knowledge, but I'm in charge of getting parts and not mechanically inclined and never will be. In my search I see often fits this one and sometimes multiple different ones. I can get a rebuild kit to do most of what is needed except the gears. I sometime see gears but they say fits and the model number. See my dilemma? So my hope is someone has seen such a list. There are sooo many Kubotas and different models out there. My belief is some parts fit more than one, right. I'm hoping a Kubota engineer with a high boredom threshold needed something to do and made one.
Thanks