MGB compact spare

I remember a post a little while ago about compact spares for B's. I don't know if it was answered, but I just ran into a page with some info. It seems that there is a Saab wheel that fits the B. Go to this link and you can email the guy a question about which car:

http://www.octarine-services.fsnet.co.uk/octarine.htm

Just thinkin' out loud..................wouldn't a 13" Midget wheel fitted into a 13" mini-spare tire accomplish the goal ?? Or does this only apply to wire wheels ??

all i know is i had a flat in my b and all i used to get to a tire shop was a universal spare bought at wal-mart