Back up camera upgrade

Hello all. I have a 1996 Winnebago Vectra Grand Tour. I want to upgrade from the old B&W monitor and camera but I want to use the same cut-out in the dash. Can anyone recommend an upgrade that would fit. I looked through Winnebagos catalog and found and insert to fill the void in the dash but it is no longer available. So,...the option of mounting a new monitor elsewhere is out of the question. Thank you in advance for any help.