Take my advice for it:
Buy a diver bottle and a fillerkit.
They are not that more expensive then a handpump, they operate faster, they give much better air and they are not expensive to run.
Dont forget that some PCP cant handle the moisture from stirrup pumps and to fill a large gun is indeed very hard work..
I used to have a FX Mk II stirrup pump but now I use a 8 liter 300 bar bottle instead, its like comming to heaven..