2-Anywhere online! :)
3-You can only use this bit in your classes if you're allowed to use two-hands in your western classes. If you're only allowed to use one, then you have to switch to a bit with shanks--like the one you posted originally. As long as you're light and give your aids with your seat, legs, and the reins on the neck, the bit will be no 'harsher' then the one you are using now. These shanked bits are not used for control (well, they weren't SUPPOSED to be), it's more like a 'graduation' thing. Remember when you were little and you could only use the big fat crayons, and then when you proved you could color in the lines they gave you the skinny ones? Same idea. You give your horse something that's a little bit bigger and awkward so it clouds any wrong signals you may give. When you and your horse are both refined, then you graduate to a curb bit! :)
SpasticDove also mentioned the 5-yr-old rule in AQHA--but I'm not sure if you show AQHA!
You would definitely be able to use this in ENGLISH showmanship, but in western, you have to use a halter!
Hope that helped. :)
Dressage in Jeans
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