parts for mitsubishi mini's

Anyone have a source for hydraulic filters/other parts for a 94 model mm30b. I do not have any numbers as they had worn off the filters that came out. Have tried NAPA, Carquest, Catapillar, and one Mitsubishi wheel tractor dealer in Memphis. No one can find these filters even by dimensions. They both are cartridge type filters. I had to wash them out with gas best I could and reuse them. Farmerboy gave me what he had for the mm 55 machine and even that part number was not good at the Cat place. Seems like someone in the USA would carry parts. I understand some of the parts that fit the Cat equivilant of Mitsubishi mini's will work but I did not have any luck with the hydraulic filters. The parts man even called and had a friend in a bigger dealership pull the filter we thought was the same and measure it and it did not fit.

Thanks,

cwheat