lexan windows are junk. they dont seal very wel and they scratch if you look at them wrong. i would get a plate box and put in the gate.
for the roll pan you have several choices - suicide doors, fbi , stylin concepts.....
and you can get a plate box from any of those as well.
are you gonna shave the gate handle? hope so so it would look right.
i would suggestion using a mar-k handle relocator kit(www.mar-k.com
very good quality and looks good as well. ive had 2 of them and wouldnt use anything else