Razor because we were in tourist village area to find our friends, there was no shortage of guides looking to take people out. http://www.slickrock.com/Maps/belizecitymap.jpg
Look at # 12 on this map we were at Mirab near there when Rod got talking to him.
The guy we used was Mike's Tours and Taxi service, and I would definitely recommend him. Our friends took his card too so I know they would say same. (he was not the first one we spoke with but so glad Rod found him)
He does city tour - Mayan sites - Rain Forest - Wild Life and cave tubing.
His contact info is....
(501) 621 - 9136
(501) 660 -5411