search ebay for dash kits. usually people use double din headunits, even touchscreen. i'm gona start working on my sound soon. planned setup:
stock Pioneer 6-Disc headunit
eDi 6500s components-front
eDi 700 midrange-rear
eD Nine.4 amp
Alpine M450 amp
2 10" Alpine Type-R (sititng in closet
)