Looking for single board controller, that uses 8052AH basic (or modern equivalent), has a multi-line LCD display of some sort, a 12 or 16 key keypad, 16 SPDT relay's (min 2 amp contacts), and at least 1 RS-485 port (in addition to programming port), on board regulator and mem. back-up battery. If you know where I can get one, let me know. I would consider a separate keypad /display board if required. Now here's the clincher - The whole thing must cost less than $ 400US. Please advise ...