I was pleasantly surprised to learn parts for my decades old Whirlpool Dishwasher Model DU6000XR were available on line through Appliance Pros so I went ahead and ordered them.
Upon receipt and comparison to the original parts I found they were a little different in design but parts provided retrofit with ease and the old basket with the new wheels installed now slides in a out of the compartment like it should now.
Thank you!
Kevin in Indiana