There are a number of items called "rebar chairs" to hold rebar up when setting concrete. Google rebar chair and have at it. Range from plastic to wire ones. I found some at both Lowes and Home Depot for about 58 cents each for black wire ones. Home Depot has black plastic stands also. Look under masonry accessories. I tried to post a ilk to both but not until I have 10 posts.
Cable lifters never worked for me, however if you want to try them, collect toilet paper rolls, and cut a 1 inch or so wide ring, and put them under your cables and see if they work for you.
Everyone uses their money they way they want. I have never heard cable lifters do anything.....