two thoughts -

a 99% factory original moss box plus 8 will have been sprayed over the beading and if at all used is going to be rotting nicely if not so already so there is going to be a bit of expense on to of the 45 if you want to use it

what's really wanted thoough I dont know whether its phsical;ly possible is a trad [sorry classic!!] body on an aero chassis - sell like hot cakes