I ordered one of the Aitech units you mentioned. I had mine shiped 2nd day. the website said thank you for your order, but gave no confirmation number. I sweated it out for two days, but my product showed up on time. I got a tracking number from them the day after it got here...it took them that long to answer my e-mail request for a tracking number. On the bright side, the Aitech unit works wonderfully.
I hope you get yours soon.