Air springs are for the chassis, brand of MH is immaterial. Use the Google search box at page top to locate the part# for front and rear air springs for a Spartan MM chassis. There are numerous threads here discussing air springs for a MM chassis.
2000 Winnebago Ultimate Freedom USQ40JD,
ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy