the Genesis is made by Concertone, which has had a roller coaster reputation with FR customers.
they make two different sizes of entertainment units.
if you have the shorter, more square unit(Group B), a Jensen unit will usually fit perfectly.]
if it's the taller, narrower unit(Group A), Concertone is the only major manufacturer of that shape.
you'd have to do some woodworking to put a Jensen unit in its place.
http://www.concertone.com/product_gallery.html
you may want to look at the speakers first, before chucking the Genesis unit. the speakers are the weakest part of the system, generally.
if you do get rid of it, send me a PM. i may want to buy it from you.
__________________
Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity