could be the motorcycle spring fellow went with springs back before hmmm. was it suprman? that found the manufacture? Any way... twas not till this happened did it open up access to parts at a reasonable cost. Prior to that... the fix was only motorcycle springs?? or NOS Bag w/ Can and they cost an arm, a leg, and your first born... per side.
In my case... will dig further and decide. Mine was completely disassembled, leveling valve removed from air system etc. by the Previous Owner. Am not sure the bags are even still installed. Anyway had a most of the parts to reinstall the various things removed in the bed of truck so was not too concerned..... until recent theft of much all of that. Think it was metal scrappers. "So what to do".. "OEM it.. or upgrade... that is the question" -William Shakespear .. or was that Robin Williams?
Ps- Got a load of OEM stuff coming on a Pallet from Suprman/Pawnking/Will and few more things from ExpeditionNW... will figure it out from there.