Look at Messicks and find the part number of the rim. Then see if the list various models that it fits. If you can’t find that out it would just widen your search criteria.
Then contact
@007kubotaguy who runs this salvage yard in California.
View attachment 160469
I found that my L185F front rims were the same as the L260 rims although the tire width is different. So he was able to ship me two rims from a L260!
There is also a place called Hey Wheel that can probably make you rims
"Hey Machinery Company Inc. wheels, rims, aircraft tires and more for agricultural and non-highway use."
www.heywheel.com