Yes.. It is available at all Toyota workhops at least in Lahore. I got mine from Toyota Ravi motors near Niaz Beg.
Usually the mechanics doesn't know that this oil is available or not. Just go to main reception and you will get it. There are many other brands selling same specs oil but just to be sure that i do not buy a fake oil or a local oil which is produced by recycling used oil(i heard it from someone).
Its made in Japan by Toyota for their own cars and also recommended for Toyota vitz. Not just peace of mind but performance speaks itself.
Just another add up.. From last two full tanks i fill 1000rs of high octane when the reserve light start blinking. Then again get the tank full by normal petrol.
With that 7litres HOBC and 4litres reserve normal petrol the car runs sooooo smooth and fast that it doesn't feel like a 1000cc car. I really enjoy driving my car in that interval. Try it yourself and let me know..
Though i have tried full tank of HOBC but thats not economical. By adding 1000rs HOBC i get the pleasure as well as the satisfaction that high octane has run through its veins and cleaned the deposits a bit..