Welcome to the worldwide club that is Morgan ownership! And of course, to TalkMorgan
When my +4 lived outside for a while I used a Tyvek cover supplied by John Worral / Heart of England - worked very well. Kept the cover when I sold the +4.
Cheers,
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly '11 MINI Countryman Cooper D All4 '90 LR 90 SW