Hi Will
I got it from this site.
http://www.motoringclassics.co.uk/lifestyle/luggage.htmlAt £255 it's still about what I paid for mine 4 years ago
Looking at the locks and details on it when I bought it, I'm pretty sure that it was made by the same people as the official Morgan one they had at Morgan France, which was way too big & more than twice the price. The supplier being an MG specialist, the pricing is perhaps keener - you can order it without the MG logo (which I did).
When I sold my Mog, I flogged mine and my hills alive fitted luggage to my friend Barry who lives down the road and has a plus4.