N82 will make a holster for your gun. Call them with the exact model of your gun. They can go to the manufacturers web site to get the dimensions of your pistol.
I am getting older and I am growing some love handles. Most IWB holsters allow the hammer of my pistols to jab me in the hips. I gave up on a IWB holster for a belly band. I don't have to worry about the proper belt or a belt at all. I can easily conceal a milspec 1911 wearing shorts and a T shirt. Belly bands have a place for spare magazines and a pouch for large amounts of cash. Belly bands are elastic. You don't have to wear the holster on your belly. You can pull it down so your gun is in the same position as a IWB holster.