Interior leftovers ideas?

I'm looking to cover my homemade speaker boxes I made for our 67 cuda.
Dont wanna use typical speaker carpet. But dont want anything "flashy". I thought I might try factory interior style vinyl. Similar to what was used on the seats, or the door panels.
Anyone got leftovers? Pics? Ideas?
Thanks.
Steve
krylon spray truck bed liner, I used it to fix the plastic seat backs in my 71 demon they were all gouged up, sanded them down to get rid of the dry plastic and smooth the gouging, shot a heavy coat let dry for a couple days and sanded them again and a quick respray and the gouging is all gone and they look very close to the original :)