Help on box for 4 15s

hey everyone...Im in need of help on how to build my box for my 4 Rockford Fosgate Rfp4415s (HE's) ... they are 1.75-3.00 recommended box size for ported or sealed...want to go with ported but will work with what i got...I want to get the most compact box that i can make but still meet dimensions as close as possible and make it look relatively nice...any kind of box/boxes shapes, sizes, anything will be great...but i need something that will fit no longer across the trunk than about 37 inches ( i kno i havent got sh*t to work with ). I have about 16 inches from the bottom of the back window or seal for the trunk to the floor(not including wheel well)... and a good 40 inches from end to end of trunk...not sure what you all think but i want to do it... no one here has 4 15s thats for sure so i figured id try it out...