My search skills may be weak but I tried.
I'd like to have the single bucket holder (LPJD100) on an X354 (I have ordered). I like the height of it, accessibility from the driver's seat and the fact that it won't get in the way of the hitch which I'll use for a poly cart. I'd probably keep a couple of pruning tools in it or just use it to pick up rocks and trash as I mow.
It looks like the X354 doesn't have the CargO system which is why the part indicates it won't fit 4 wheel steer models. The rear wheel articulation must get in the way somehow.
The two bucket model blocks the hitch which I'd like available for a poly cart.
The Carry-All (LP92557) appears to also use the CargO mounts.
The X7XX can install a hitch extension but not the X3XX.
Has anybody come up with something clever?