There are no news on the web about low TDPs' availability date. I would love to have an idea about that too.
Possible that these "L" E3 Xeons are only for OEMs and won't be available for retailers ?
I'm afraid you're right.
The page clearly states "CM8062307262828 is an OEM/tray microprocessor".
Furthermore, a french equivalent of this website shows the OEM reference number, but not the BOX one.
So I think you're right ; and that's just too bad. I really needed these CPUs...