Next loader would be an LX 252. 

The 232 is rated at 2400 lbs to full height. 

252 is rated at 3400 lbs. 

As far as what other, newer loaders might fit. No idea. 

https://www.tractordata.com/farm-tractors/001/6/3/1631-caseih-jx1100u-attachments.html

The 52LA self leveling is rated at 3445

I don't suppose the loader would swap?