Yeah you find them in bosters, They're very rare though, chances of you finding one in under 50 packs is pretty low. Best to buy it off eBay if you need it badly.
OK just to clear everything else that isn't mentioned.
First off the 124/123 thing is just to show its a Very Rare Card. You'd have better chances find a LV.X.
Now ubtaining this card takes drastic measures (meaning paying $50+ for one). IMO, I wouldn't play this in TCG because it's just to risky and isn't really needed for a deck to run.