Thanks, I'm thinking to use 2x4 as furring strips (really 1.5") & then 1/2" drywall will give me a total of 2" of depth. I can then use a product like the one below. Still not sure if I have to have outlets by code but but thinking I can either run wire down to each outlet or split the furring strips to leave space for wire to run between outlets (as in figure below) the former probably being the easier idea.
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