dakota headrest monitor

Hello gang, awsome site here, unbelievable info, best i have been able to find on Web so far.Just installed my in-dash player with 7"flip-out,and i want a set of monitors  in the rear cab for my kids.Vehicle is a 2004 Dakota Quad cab with highback buckets.Any tips/Hints will be great, i went with 5.8" monitors as workable area across top is only 8"W x 6"H.I am pretty handy at Fabrication,as i am a carpenter, but when i squish these together front to back, feels like hardly anything in there at all.Any help will be appreciated from whomever may have some experiance.Thanks in advance,Brian.