I've never used
this place myself but I have in my notes that Nassau Auto Spring is a good place to go especially for suspension problems which is their specialty (evidently, several RVers have used them for air bag/suspension issues).
They supposedly do alignments on all heavier vehicles but viewing their place on Google Street View (
click here), it appears as if their bays are limited in size. I'd give them a call and describe your rig and see what they say.
Nassau Auto Spring Truck Repair Springs Long Island NY
2110 Jericho Turnpike, Garden City, NY 11040 • 516-747-0645 •
.