Probably not what you are looking for but here it is anyways. H.B.E. Specialty LeatherWorks makes an IWB Tuckable holster called the DC Tuckable. Because of the wide spacing of the clips, the holster is amazingly thin where the gun sits. It is not "soft" like you requested. It is, however, a relatively comfortable and VERY secure rig that will require no mods to your gun. Mine is currently being built by HBE Owner Eric Larsen and I'll post pics when it arrives. You need a solid rig for big guns like these. My CZ SP-01 Tactical weighs in just under three pounds with a fully loaded, 18 rd magazine.