Hi Pinky BTB,
my hubby is also very big sized... we went to a few BS in Sin and couldnt get a coat of his size. But quite lucky for us, we managed to find a BS in Johor that happened to have a coat that he could fit in. So we rented the coat from that BS and the rental was cheap also. If i didnt rem wrongly, we paid like only RM100 for rental of the coat for abt a week.