Replacement pads for formula rx brakes.

Can anyone recommend replacement pads for my formula rx brakes, I've just come back from a day in Dalby Forest and worn out the originals in one day (apart from a couple if local minor outings on my new Zesty that is!!!)never expected to need replacements so soon so would like something that'll last a bit longer!!! I've heard sintered pads would last longer but not sure about price or make etc, cheers.