You can replace the factory bags with shocks and coil springs. It's a lot cheaper but you'll still pay about $250 per side but it eliminates the suspension bags. You'll also have to replace the top bearing caps and they're about $160 ea. We do it all the time for people who don't want to drop thousands of dollars on replacement OE bags. As of now, aftermarket doesn't have a shock/spring assy. for the EL.
2013 Jayco Eagle 328 RLTS
2012 Ford F250 6.2L 4x4 CCSB W/Air Lift air bags
2002 Coleman Bayside Elite (traded)
Me, Momma and Charles (RIP buddy)
And introducing Sofie!! ;)