he is wanting something like this

It is an SRT 392 6 speed manual, he will have to do stripe delete to put on these stripes he likes, comes with two wide stripes in the middle. He is going to test drive Challengers today and I just might have to go with him
When you are crawling around, it might be better if the weight were on a pad on the front of your shin, rather than a situation where ceramic tile is crushing things against the bones of your foot and ankle. This would probably be better than most, if not all knee pads I would suspect, maybe a bit cumbersome, maybe a couple strips of that egg crate stuff or split some pipe insulation and lay it flat.
You could squirt some of that foam insulation for inside walls into a sock or something and mold it to your shin. I just thought of that though, so it might not work