To my knowledge a pistol grip was never made for the Snake Charmer, I think it has something to do with it being considered a sawed off or something like that, If you wanted to put a pistol grip on it you'd have to shorten the barrel to pistol length. (Which you would have to do anyways to fire it like a pistol) I personally just cut the unwanted stock off, sawed the barrel shorter, and then fiber-glassed over the grip to smooth it out and make it comfortable.
Instead of defacing your Snake Charmer, you really might be further ahead buying a Taurus .45/.410 or any of the Bond Arms derringers chambered in .410.
You can purchase the pistol grip for a Stevens model 67 series E 12 gauge shotgun at most gun stores and at most gun shows. You can also purchase this type of accessory at hunting supply stores.
No
You need to purchase a tire pressure gauge. Using this, remove the dust cap on the tire valve and press the socket of the gauge firmly onto the open end of the valve. The gauge will show the tire pressure in the tire. After using the gauge replace the dust cap on the valve.
You will have to remove the instrument cluster to gain access. You might want to purchase a Haynes Manual that will instruct you.
replace temperature gauge
18 gauge steel is not bulletproof for rifle rounds but is for some very weak pistol calibers
About $285 at Gunsatcost.com
Unlikely
instrument cluster needs to come out and apart to gain access and replace gauge
Shotgun by far
Take out the fuel gauge and fish for the magnet inside the fuel tank. Then disassemble the fuel gauge to replace the broken magnet. Reassemble and replace. Done...
50- 300 uSD