Sixpack no more on suppliers?

I was checking our suppliers respect mikrotik and found that they do not have six-pack. Is there any way to check that the purchased pieces SXT and SXT-AP are from Sixpack? I hope that the dealer does not extract Sixpack and sell content separately.

And how MikroTik should be now controlling all distributors?

Actually, distributors that have Sixpacks in stock, have special Sixpack icon next to them in this list:
http://www.mikrotik.com/buy