The center armrest on my 04 EX-L is completely flat and hard. I bought a replacement leather cover for it, and now I just need to find some suitable foam. I've searched the forums extensively and all I see is people saying they used foam from a fabric store, or they took the armrest to a car upholsterer and had them do it all. So my question is: what kind of foam should I use? My fabric stores only had some very thin, soft green foam that compressed too easily. Should I use a firmer foam, and how thick should I get? I've seen suggestions like 3/8" and 1/2". Is a neoprene foam too hard? Or is there another type I should look into?