I just picked up a 5.11 Tactical leather belt on sale for $2.99+shipping to go with my $15.00 Glock Sport Combat Holster. The belt is nice and stiff with the insert stitched in. The holster is as basic as they come. This combination is holding the G30SF nice and tight.
You don't always have to spend a ton of money to get something that functions well.
Of course, I have a nice Beltman belt and soon will have a Fist holster made just in case.