Well, I can see why Yanks might need one - I've not seen a MOLLE pouch of a similar same size as the utility pouch (waiting for all the links to the hundreds of variants actually out there.)
But, even if any ACF AIs need to (or choose to) buy their own gear, whether for some sort of "gucci warrior conviction" or merely to allow the limited amount of webbing their unit has available for issue to be lent to the cadets, £10 for a 2nd hand PLCE pouch (which even comes in UK DPM for free) is a lot less than $45 plus postage.
I must admit, when this question came up, I took my Jetboil, which normally lives in a daysack, and pulled the webbing out of the cupboard, shoved it in the most likely pouch and came back and posted.