In reply to Morph, our 50mm spacer was home made - a 50 mm length of 75mm/3inch Aluminium rod (nicely pre-cut and pretty cheap from
www.clickmetal.co.uk) drilled with a pillar drill to match the steering wheel bolts - add decent quality suitable length bolts and job done - 8 years service now...
Understand you can buy spacers from motorsport places to match the Lifeline QR steering wheel coupler used by Morgan until recently...another alternative is a dished wheel...