town and country

Have a 2005 Town and country looking to put two JL Audio 10W6v3-4 and JL Audio HD1200/1 amp in rear cargo area when seats are in the in-use.position. I have about L40" x W24" (front to back) x D10" (bottom of seat area to main van floor height) 40"x24"x10". I want to build a custom...