That rack’s designed for an Elise/Exige rather than Evora – different body shapes…
Andy, have you tried the usual Lotus accessories specialist – Elise shop, Hangar 111, Eliseparts, etc…? Some of them do boot mounted luggage racks that you’d be able to fit a bike rack to but they have a weight limit of about 50kg (I think) tops. The Mk 2 Elise is less forgiving than a Mk 1 because it uses thinner fibreglass for the bodywork.
There’s no way I’d drill holes in the bodywork of mine just so I could take the bike but I can fit my Scandal 26er in the front passenger seat with wheels and saddle/seatpost removed and strapped in with the seat belt. Not ideal but it works. Just. You must have more room in an Evora than I’ve got in an Elise…?