Can I fit a full-size spare wheel anyhow?

Just wondering if anyone knows if I remove all the polystyrene from under the boot floor, will a full-size wheel+tyre fit in there?

Or has anyone made any sort of accessory/attachment to carry 1-2 spares on the back?

Thinking of moving to Kenya in a year or two, shipping the Evoque over there for £800ish (they sell new for about 100% markup on UK price, so crazy to try to buy even a second-hand one, but no import duty for returning residents), but not having a real spare isn't ideal. If there's no elegant option, it'll go in the boot or on the roof.

I'm sure if you make your own inserts you could raise the floor of the boot space over a full size wheel in the bootwell or make a shaped floor section that goes over the wheel.

Buy the roof rack and the baggage basket and carry them in that. I think fitting them in the back would be a nightmare.