Does anyone know of a manufacturer who makes a Prolocker-style device that will fit the 11x4-5 caster tires used on larger walkbehinds, Standers, and mini-z's? The smallest Prolockers are designed for no bigger than 10.5" diameter tires, the next size for no smaller than 12". Has anyone tried using the small prolocker with 11" tires? I heard that Jungle Jim is supposed to be marketing a Prolocker style device, but I have been unable to find any specifications or whether they will fit the 11" tires. Any information? Thanks.