A new entire set runs ~$100 nowadays, - up from $70 a few years back. You can of course contact Airlift to see if single pieces are available - likely 2/3 the cost of a new set. I had a bag blow after 15 years only AFTER a muff shop replaced an OTA pipe too close. Even after stating they be mindful of.
You refer to "not holding air", and also "blowout". Whether just a leak or the latter, try to locate he failure first. The bag may have failed from closeness to exhaust than anything else. Mandatory to use the supplied heat shields on B/D bodies.
The legitimate dampening performance in any airshock will not come close to that of a quality separate shock. You're getting a low performing shock that is relying on the airbag to provide the majority of dampening - and also double-dutying as a spring. Stick with separates.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!