Ya, the 8 shot full moon clips are way to big to carry in a pocket. I think they are only useful for competition shooting but half moons would work good for carrying. I looked all over the net and I don't think they are made cause I think I would have ran across them by now but I figure I'd ask.
Little off topic but simply rugged leather has came out with a neat looking moonclip carrier for the belt. I have the same problem carrying 8 rounders! There is no good way to carry them except in a contraption that prints worse than the gun! I'm going to order one and test it out. I also looked for half moons and have not seen any. I would imagine that a four round clip would be very brittle and probably bend.