Honda parts interchange

There is a mat under the carpet against the firewall. It is a black mat - foam with a black rubber coating on top. I need to know if that mat (from an 88 crx si) is the same as the mat from any other 88-91 civic. I was thinking of pulling one from a 91 4dr civic.

The front half should fit, as most of the floor pan is the same. All it is is sound insulation. Is it really worth the hassle to replace?

It prolly wouldnt be worth it, but I'm trying to do a full on restoration with this car. You can check out pics of it if your really interested at ericweber2.home.comcast.net =)