Shelf riser help, looking for ideas.

I’m trying to figure out an effective and cheap way to make shelf risers. I’ve seen several types on here. I recently saw these peg boards at my local dollar tree. Has anyone tried to use these as risers? I think they would work really well. The only problem is that the don’t have legs and I can’t seem to find if the make legs for them. Might try some PVC if I can find some with a small enough internal diameter.