Replying to J-Bar =/= Furniture pads???

So my boots are really beaten in and my heel lifts a bit when nose pressing and shit. I’ve looked into buying the actual J-Bars but here in Poland, they don’t really sell them (I’ve tried looking everywhere). One solution I think might work is taking a mat of furniture pad and cutting a j bar out of that and glueing them bitches on my liners since the furniture pads are just as thick and look like the same material j bars are made out of (not sure though)... what do you guys think about the ghetto heel lift fix?