i have these ^^^ i bought em at a martial arts store for about 60 bucks.. viper grappling gloves. they come with a grip.. but you can take a razor and slice the ends and slide that grip right out and your straight!! when i hit the bag i use these gloves and when i'm in the ring i have to use regular gloves but i'm picky about my gloves.
you can buy them here
http://mauler__1.tripod.com/hsdcombat2/id9.html