For anyone that is interested, Rotochok are now able to produce for the "EZ Tow" axles such as those on the Lacrosse and Tracer. Had these on my last RV and they eliminated all movement.
You have to buy direct from Rotchok: Rotochok Online
Just call or email. They are very friendly and responsive. The website says maximum of 6" separation between tires, but they are making them for the larger spacing.