SNMP via proxy

Hi, A bit off topic. One of my early mistakes in my 9-5 was hard coding the IP's of our SNMP box in all of our gear (networking equipment, Servers etc,). The box is at its limit and increasing its capacity will be nearly impossible. We mainly use Nagios and Cacti to monitor our network. Going forward I was thinking of setting up a few hosts whose job would be to simply relay SNMP traffic. This way moving forward we could hard code several IP's and bounce all traffic through one of these IP's. TIA for your advice. Regards, Dovid