Probably their websites are just wrong. Unique Photo has been saying in stock for months and they haven't shipped a single lens I don't think.
Precision camera is slow to update, but I think they did have stock briefly recently because they went from no orders taken to "in stock" a few days ago. They did a similar thing with the batch a few weeks ago.
Berger Bros was listed as preorder for a long time but changed to stock a few days ago. I suspect same story as Precision, slow to update the web site. Most of these places only got a few lenses and after filling preorders probably went out of stock in one business day. For reference, B&H which had well over 70 pre-orders and does massive amounts of business only got 20 lenses in the batch last week. Most stores were getting three to six.
I got mine from ********** and they sold their six lenses within a few hours of someone posting a stock tip on DPR.
Anyway - to the OP, sorry for the bad lead on those two sites. I kind of suspected they might be out of stock again, but they were the only places I knew of that almost certainly had recently gotten stock in the past few days and might have had some...