This is the reality of using the space saver, luckily I was solo at the time. It was a rear, and driving on the space saver was a scary experience. Driven on them before, but the Z3 was not pleasant.
Yes, I bought an as new space saver spare wheel and unused tyre on ebay for around £70. Tyre weld will not repair all punctures, where the tyre wall is ripped or the seal is broken. I for one would not be without a space saver tyre. The punctured tyre and wheel could go in the boot with the boot lid lashed down. Many tyre companies will not repair a tyre which has had tyreweld used anyway. Also check on Amazon.micklaw said:still not having much joy new tyre wont fit in carrier
surely someone must have overcome this problem