I bought some rubber ones for a +8 off e bay and they fit my Roadster but you have a wider gearbox tunnel so they would be a tight fit.
https://www.ebay.co.uk/itm/MORGAN-PLUS-8-1968-TO-2004-TAILORED-RUBBER-CAR-MATS-WITH-BEIGE-TRIM-2123/163312987491?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
