There is a lot of great riding to be found on Luzon, with rental bikes available at Angeles City, less than 2 hours riding/driving distance north from Manila. If you go to page 65 of this thread, you will find more information about rentals and riding on Luzon.
There are a few other rental businesses that I know of on the islands of Negros, Cebu and Bohol...I'm not sure if all the businesses are currently operational or not. Nice-Bike in Angeles City has Honda Transalps, Dominators, and miscellaneous smaller bikes to rent, at least if you aren't a Filipino.
If you are looking for a tour guide, try Craigslist...there are many female "tour guides" who advertise there!