I've been able to save old o-rings with dielectric grease. when they fail, they fail FAST....it would be obvious and audible.
Sometimes when you release the air from them and remove them, the o-rings blow out of their little recess position. I roll them back in, and lube them up.
also, sometimes the newer air struts use the new-style solenoid with the filter at the top.
I'd let it air up, and get a spray bottle with soapy water and hose them down and look for the leak.
yes, new o-rings are best, but while you're waiting for them, might as well confirm that possibility or look for another.