I bought a small strong box w/a key lock and had a local metalsmith drill two 2" holes in the back. Through these I padlocked the trailing ends of a a long cable which I wound around the left front seat runners. This lockbox on the left, backseat floorboard is where I store my carry weapon the few times I'm not able to go armed. It's not a perfect setup, but beats the shiznit out of a glovebox.
"But today you just read that the man was shot dead
By a gun that didn’t make any noise
But it wasn’t the bullet that laid him to rest was
The low spark of high-heeled boys"
~Traffic - Stevie Winwood~