Oh I know mussafah...on a nice day it should not take you more than 15 minutes to get to Carrefour near the Khalifa mosque...you'll get quite a few MF collection there ranging from 12 AED to 30 AED...Chamois options are plenty as well but they start of 35 plus. you'll get quite a few Armor all products at carrefour as well.
For MEGS (in product range plus MEGS MFs) you'll have to come to Dubai and visit Yellow Hat on First floor of Times Square (mall) (an interchange after MOE coming from Abu dhabi) on Main Sh-Zayed.
Prices...well
The Most expensive item was teh Megs NXT for 65 AED and cheapest was MEGs Gold Shampoo for 37 AED (Not counting the Armor All Tyre Foam which was 22 AED). MFs which I got from here ranged from 20 AED to 30 AED.
Megs MF however, started from 55 AED and averaging at 70.
I will try to check out ACE as well in a day or two as I have heard they have some range of MEGS as well...