I don't know of anywhere locally that carries them. I ordered mine directly from Timney. You can get them from the big suppliers but they are all set at a generic 3 lbs. and you have to adjust from there. I wanted 1.5lbs so I ordered it from them set at 1.5lbs, just one less thing to tinker with. Ordered on the 5th and it was at my door the 9th. When I ordered mine it was cheaper to go through them directly, my total shipped was $137.45 for the 510 which beat Midway then by a couple of dollars. I just saw today that Midway has them on sale for $110.99 (+ shipping) for the 510 (assuming you want the safety).

http://www.midwayusa.com/product/220...ator-_-SpotOne