Making a slider drawer for Hydraulic unit and batteries

I have a 94 26' Hi-Lo that has the hydraulic power unit and the two batteries in a slide out drawer that needs to be rebuilt.
The platfore is plywood so that much is easy to replace but the slides the factory used could not take the weight of the two batteries my Dad bought for it and it bent the one on the battery side. the drawer not sliding makes it hard to maintain the batteries.

Has anyone fabricated a new drawer in a simular situation with rollers that would work in this application?

 

fixed the problem and used 4 heavy duty drawer sliders from Lowes to rebuilder the slider.