Where do you typically carry?
If I'm carrying AIWB, Raven Concealment Vanguard 2. If I'm carrying at my 3, Comp-tac Minotaur.
Concealment Solutions - Custom made concealment holsters
He doesn't pay me but he makes the best IWB holster in the market, IMO. He will provide you with a superb product at a good price and sponsors several GRR podcasts.
Push the boat out and get the horse hide and CE options.
+1 on the Comp-Tac Minotaur. Plus they're located in Houston.
I don't know if the Vanguard 2 fits the 30s, but it's worth checking out IMO.
Everyone seems to fit these holsters differently. I had a hard time hiding a Glock 19 but I have colleagues who hide fullsize 1911s with no problems. Even amongst close friends I find that despite our common tastes in guns and gear, we all wear different holsters and all in different locations. Most of us have had to try out several before finding one that truly works for our individual needs. I have one friend who has a box full of holsters he won't wear. Don't be discouraged if the next holster you buy doesn't fit quite right. Definitely don't throw it away after wearing it once. Let it break in (especially the leather/hybrid holsters). It may grow on you. Even the better holsters take getting used to. And if it doesn't go well, don't forget, there are plenty of other G30 owners who would love to try out the holster you don't want.
Check out Crossbreed and Milt Sparks too. And best of luck!