I was very lucky a while back and got an as new Mini spacesaver spare wheel and tyre from ebay for only £20 as it was local and I was the only bidder!
I opted for DIY retro fitting the optional MINI space-saver spare under the boot floor but this can only be done on the MINI One or Cooper. On the Cooper S the twin exhaust box and battery are in the way.
Spare wheel carrier assembly part numbers and prices for Cooper and One (2008):-
41 11 7 043 349 Holder £3.83
51 71 1 510 375 Protection Foil £0.47
41 11 7 044 687 Guide £0.47
41 11 7 044 685 Spring £4.65
51 71 6 800 127 Cover £5.35
51 71 8 165 737 Lift Handle £2.77
07 12 9 904 868 Hex Nut 3-off £1.92
16 13 1 176 747 Nut Plastic 7-off £0.78
51 71 6 801 257 Spacer Rubber 3-off £2.82
07 12 9 904 864 Hex Nut £0.38
51 71 7 184 110 Support £27.50
Easy to fit once you have all the above parts. How to fit the spacesaver spare details here: Goodyear Eagle F1 GSD3 215/40/17 v Runflat Tyres - Forums
The retrofit installation of the MINI spare wheel and associated components:-
The first thing to do is to open the boot of the car, lift up the carpet and remove the MINI Mobility Kit or whatever may be installed in the cut out in the floor.You will see a rubber bung and three threaded studs.
Get under the car, you will see a plastic cover/undertray by the side of the exhaust. Remove this. It has 2 nuts that need to be removed at the back of the cover and 3 screws at the front.
By removing this cover you can now see the under side of the rubber bung and 3 more studs facing down. The threaded studs may have a rubber cover over them. Remove the bung and rubber stud covers.
Assemble the items inside the car in the order shown in the Realoem.com parts drawing to the 3 studs using plastic nuts. (The latest assembly listed in my parts list above is modified with less parts to assemble than shown on the earlier realoem.com diagram below). RealOEM.com BMW R50 One 1.6i SINGLE PARTS F EMERGENCY WHEEL MOUNTING RealOEM.com BMW R50 One 1.6i SINGLE PARTS F EMERGENCY WHEEL MOUNTING
From the underside of the car, fix the final component with 3 plastic nuts to the studs.
Fit the 3 rubber bung buffers to the existing brackets on the underside of the boot floor.
Place the space-saver spare wheel over the plastic support assembly on the ground and position it under the car. Fit the lifting handle to the assembly through hole in the boot floor and pull the wheel up into position. You may find that you need to move the exhaust heat shield out of the way of the wheel. The wire spring clip holds the wheel up while you tighten the retaining nut with the wheel brace. This nut is the same size as the wheel bolts. (See also MINI Handbook for more details and pictures).