Picked up a G17 Gen 5.
I like it more than the Gen 4 I had previously. The removal of the finger grooves is a huge improvement, and I like the flared magwell.
If you are looking for something specific, you are probably stuck with online.
Mass Firearms School had some stripped lowers when I was there a few days ago.
My ammo is in locked ammo boxes on wire racks.
Unfortunately since I just have nowhere else to store the boxes, the racks are in the utility area in my basement where the electrical panel and furnace are, so if either of them need to be services there will be in plain view.