Thousand Oaks has been backordered and out of stock for a while
I placed a direct order with them several weeks ago, and they told me that they can't take any more orders for delivery before the transit.
I didn't realise that there was also a May 20th annular eclipse for the North Americans too... I should have ordered the filters it months ago!
I'll probably just end up getting a roll of the Baader solar film.