Hi Jack,
you could carry a spare wheel of your choice by ordering the MORGAN 4/4 Sport´s luggage carrier plus a set of fittings for spare wheel-to-carrier, supplied by i.e. Flaving (i think may be "Mogstar" should know more?!)
If you choose the "narrow" (165/80-15) wheel of 4/4 Sport things won´t look TOO strange / "set-on-top" (see attachment below)
