Don't know if you want Tyga specifically, but MNNTHBX have them available and their shipping is very quick, at least in the US. And quality is great. I bought one and am about to buy two more, in different sizes.
And...they're one of the forum sponsors - Bonus!
44T sprockets for the RC will be in stock again very soon. We've made them and they're away at the anodizing factory. Should be back Monday or Tuesday.