My 29MV has a similar setup where the bed goes out with the slide. I don't have storage under the bed but have to access two panels, one for plumbing and the other for electrical. I screwed a bracket to the underside of the bed and use a closet rod to hold it up. Not as simple as gas shocks but it's the only thing I could come up with.
2015 Greyhawk 29MV
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Ready Brute Elite towbar with braking system
TST 507 Flowthru TPMS