I have an Umarex that I really like but I'm only seeing the CO2 bulb seal for sale overseas like in the UK I called them and they told me they don't stock them obviously they just want you to buy a new gun. I'm looking at some of the daisies like the 408 so what I'm asking is what co2 pistol could I buy knowing that I can rebuild it if it starts to leak? I'm assuming it would be a Crosman or a daisy but to be honest I'm not having a lot of luck finding those seals either. Let me know what would be a good pistol to purchase that I could rebuild it doesn't matter if it's pellet or BB. Thanks in advance