Explore the John Jackson holster.
Jackson LeatherWork LLC. He is an honest, caring supplier to his customers.
Have been carrying a Sig P290RS for several years AIWB and completely pleased. Originally my wife was the primary EDC, once she got used to the Jackson holster, we have to "share" it now. If I had to buy another for my own 290, I would in a heartbeat.
I do not even need a belt - the clip retains the holster extremely well, the design tucks the butt into the gut that even a less than flappy shirt is no problem at all.
I have already ordered one for my RAMI 9MM. 6-8 weeks [but last one came a lot sooner than that] and pricing does not break the bank.
I am not associated with the company, nor have anything more than being a highly satisfies customer.
On several occasions have driven my car for more than 4 hours AIWB with no discomfort at all. Sitting is not an issue - I actually have the 60 year old married guy gut as well.
JoeSig