I went to a local larger scale cabinet manufactuer and had upper wall cabinets made. Built metal frames for the work bench that allowed 3/4" HD particleboard panels to be dropped in, then when to a local sheet metal shop and had the bend up 14 gauge cold rolled steel with a 7" backsplash and 2" front edge. Then put Craftsman tool boxes under the benches. Very satisfied with the results after 8 years of usage. Very cost effective compared to the prefabbed garage systems I've seen marketed.
Here's one section:
