I bought from both Hawktech and Rimfire - same day as well. Rimfire has arrived, only took about 4 or five days...still waiting on the Hawktech shipment though.
Customer service was great with both for me though - asked both some questions on email and both responded promptly. Hawktech is now charging more to ship internationally (15 us). Rimfire didn't charge extra.
But ya, Bits of Pieces has some stuff in stock - included GM barrels and has been great at answering questions.
Also - Fabsports has parts, barrels etc in stock - but I've sent a few emails asking questions and they haven't responded...will still likely end up ordering a new kid bolt assembly from them though - gotta love the scalloped version!
Last but not least - just ordered a trigger group from Hornet products, so we'll see how quick they ship, and what it's like.