According to California Chris, Bay Leaf Green and Copper Bronze are deleted completely from the whole Transporter range, but as far as I can see, they are still available on the base van. Either way, there will still be requirements for pre-sprayed replacement panels / parts for repair work, so they will still have some paint. It's usual to change some colours each year, so they've done this before and must plan to have a period of switch over.
If anything, orders in the deleted colours would move up the list to clear them I guess?
incidentally, I've had no reply either but wasn't expecting one either.