Actually, I have... and I think "clothing" can be considered the singular form. Here's another one for ya: I've always wondered why we wear a "pair" of pants. "Pair" implies 2, and pants are a single item, unlike a pair of socks (2 socks), or a pair of gloves (2 gloves), a pair of shoes (2 shoes)... So why is a SINGLE "pair" of pants (1 article of clothing) a PAIR...??
I would never disagree with my good friends Rathkeale and Sincerity even when they dodge the truth. However, in order to add a little culture to the otherwise mundane answers to your question, let's see what the poets had to say about it.
There was a young girl from old Natchez Whose garments were covered in patches. When comment arose On the state of her clothes She replied, "When ah itches, ah scratches."
So garment is another alternative but it doesn't alter your comment that CLOTHES is a plural word and breaking it down to cloth just doesn't cut the mustard. I mean, would Cinderella have gone to the ball if she'd had to wear a cloth?