Blade tech makes a nice package of a holster and mag pouch, but i'm not sure what your budget is. My son shoots a G34, and we just bought an el cheapo Fobus for $12. It had a serious retention pull, so I popped the rivets and replaced them with small bolts and screws, with washers inserted to spread the two parts of the holster apart and therefore lessen the force required to pull the gun out of the holster to a competition level. So if you have no money, but have time, you can make a fully adjustable holster for not a lot of money. or, you can buy the really nice blade tech adjustable holster.
regarding mag pouches, don't buy the nylon fabric Gunmate-type ones, as soon as you start running during your transitions, the mags will fall out. I'd get the cheap Blade-tech two mag holsters, there is no difference except appearance to the ones they sell that are more expensive. i called Blade tech to confirm this. These are the ones I'm talking about that you should get.(
http://www.blade-tech.com/-Millennium-Double-Mag-Pouch-W-Tek-Lok-pr-1048.html).
My son competes in Production division, and competes with 5 magazine, 4 and his LAMR mag. Therefore, he uses 2, two mag pouches, so he can carry 4 on his belt. Last month, there was a stage with 40 rounds. Even when you start with 51 rounds, if you throw a few misses, you'll want that extra magazine. I shoot single stack, and started with 41 rounds on that stage, and ran out of rounds...
Whatever you get, you want plastic or kydex, in my opinion. These are hell on the finish of the gun, but there insn't an alternative that I am aware of. My son wears this on a regular belt, not a CR Speed. I use an 2" diving weight belt, which is that same width as a police duty belt, so i can always find stuff to fit the belt.