You ought to be able to bring something up and off of the seat slide. Mount it to the seat part so it adjusts along with the seat. It is bolt.usually bolted together with a 5/16-8mm
I have been pondering this too. I am thinking of a mount on the side of my console by my right leg and easily hidden by the seat with a towel thrown over it, maybe some variation of a hard shell IWB. Since i carry GLOCKs, less holstering is better. Use this for my 42 as an immediate response until i can get to my 4 o’clock carry weapon. I just don’t like having an unsecured weapon in the car. I have a small gun safe under the front mat for those places, fortunately few here, i can’t carry.