Not that I know of. Talked to my expat friends around here. All the ones that have bikes pretty much told me to plan on new tires every 1-2 years. They each told me where they prefer to get their tires and all that. But, one of them did say he won't buy local and would only buy on trips to Manila or Cebu. Said the quality of tire he buys cannot be found in the province.
So far I had to replace my tubes 3 times. Never my tires. Been about 18 months on the bike I have now and they are probably about 1/3 way worn treads. So about half way till time to change as I do not want to drive on bald tires. But I just put around town and take vans to get from city to city instead of my bike.