trunk interior

i wanna hook my trunk up fatty but im not sure what to do. i have some carpet and i was going to replace the current cardboard piece with some plywood and wrap it with the carpet. however i have 3 10" JL audio subs which come in a custom inclosed box. and behind that i have a rear strut tower bar. i wanna somehow get some DYI fiberglass and line the inside or get some custom carpet. i need some help here folks im a new member and a absolute honda lover, besides my girl. help me OUT!!!!!!!!!