I bought a big bottle of Zip Wax ultra-concentrated for P460. It's supposed to be 3X concentrated than the regular Zip Wax. What I like about it is the cap which is use as a measuring cap. I'm estimating that this 96 oz bottle has 24 servings. That's P19 per serving.
There are 3 other brands of shampoo-wax combo that I know of, but I haven't tried any of them. Big Berts, Polyshine, Formula 1 (cost P550 500ml), and Micro Magic (Blade P99 for 1L).