Hi Scott, for my 3200 & GS I bought one from here https://www.carcovershop.co.uk/covers-indoor-outdoor-Maserati.asp.
You don’t say which model you have, if you are after an OEM they sometimes come up on ebay at a good price
https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2380057.m570.l2632&_nkw=maserati+car+cover&_sacat=82099
Tony
