Thanks for the welcome. this has happened to me also I ended up buying another bottle and have had people try and screw me out this bottle also.
Usualy you can refill the bottles at a local fire extingusher place.
Same old story all they want is that aluminum, I have had my keg dispencer for 10 years and everyone is out to screw you out of that tank.
Its not worth much but 10 bucks is 10 bucks.I wonder how many people here have thier original tanks.