Need some bumper advice

I talked to a place about doing an exo cage and well I dont have sliders or a rear bumper that ties into the frame but they are making that as well...but... my front bumper is the custom 4X4 earlier bumper (http://www.off-road.com/jeep/cherokee/2000/08_aug/custom4x4-prorock/prorock.html) and (http://www.off-road.com/jeep/cherokee/2000/12_dec/custom4x4-brushgrd/c4x4brshgrd.html) as you can see the brush guard is bolted on. Well the shop doesnt want to tie it into that because they dont think its sturdy enough which makes since but they also dont think that the tubing is strong enough. Any suggestions or opinions on what to do id like to atleast keep the bumper.

unbolt the brushguard, sand off the finish on the bumper, let them add their own brushguard, and tie into that. then repaint it.