i got two different sets of gears in my car cause they said it would be '2 weeks'!!!  comunication people!!! geeez!
I nearly ended up in the same boat as you when I ordered mine, I got the front sent out with my Centreforce clutch and was going to fit it but then decided to wait just in case the inevitable happened and the 12 bolts were delayed.
I was right too email after email, the occasional phone call and it was all ways two weeks away, two weeks away, two weeks away then any day now. Steve K even told me at Xmas they were only a few weeks away !!
Then as luck would have it salesman X was walking past the front 5.83s in stock and noticed a 12 bolt rear in among them which he sent out to me with my Anvil. After reading all the post above I feel extremely lucky that I was the one that got it otherwise I be right there beside ya bitching too....
I'd be ringing Steve K and asking WTF is going on and voicing that this is going on too long and I'd like an explanation for the status of the 5.83s.
A) are they ordered as per your concerns with the discussion with Richmond about a PO.
B) if so WTF is taking so long ? Richmond to busy with other work to run them ??