The question is how much do you want to pay?
You could take it to
Sleeoffroad.com - Toyota SUV Off-Road Outfitters they seem to mainly focus on land cruisers, but they would certainly know how to handle your 4runner. However slee offroad are experts and highly sought after, so I'm sure they would have justifiably high hourly rates and probably a long waiting list to get in.
The items you are describing (timing belt, back brakes) should be able to be handled by any competent mechanic and doesn't require a toyota specialist. If you do not want to pay for slee level of expertise I would ask friends, family and coworkers for mechanic recommendations.