Those bars could easily be replaced with PVC piping that you just need to cut to the right length and then keep sturdy with a base. Description from architecturendesign.net. I searched for this on bing.com/images
Paint Storage Shelf made with only 2x4s
DecoArt Blog - Craft Paint Storage Ideas. #organization #decoartprojects
Craft Room Monogram
Craft Paint storage idea on MichaelsMakers Craftaholics Anonymous
How To Build A Paint Storage Cabinet http://theownerbuildernetwork.co/x6sb Here’s a great project to organize and add storage to your workshop! It’s great because it provides easy access to all your paint cans. You can sort them according to brand, type, colour or size.