I suspect they will be building them in the special projects area and dovetailing the work in with the ex Bristol BMW V8's being built up as specials for customers.
I think there are enough surplus Plus Four and Six models available on the market right now as is often being flagged on here

I can't help wondering if the addition of the extra wood on the new model was influenced by the Special four seater they built with the marine influences such as mock decking, it was the one with the white fibre glass roof.