First gen Firebirds and Camaro's had space saver spares in 14 inch. They were regular width but with the rubber band looking tire that was small until you inflated it. They come up on eBay every once in a while. Not sure if that would work for your application or not, but they certainly had them.
Mini spares are 1" bigger than the tires on the car so a 14" would come on a car with 13" wheels, don't think there are any with your bolt pattern. A 15" off a car with 14" wheels might be out there, be sure to get one off a rear drive vehicle, the front drive ones have too much offset.
Now where the hell around Antigo Wi. am I gonna find a 87 oldsmobile cutl*** with the spare still in it. Anybody got one of those that they would be willing to let go? BB
Bob, I've got one. It's a 15" rim. 5 x 4 3/4" bolt circle. With no air the tire looks like 20 1/2" diameter about 6" wide. Yours if you want it. Phil pprather@aol.com
Overall height and bolt pattern are what you need, hate to say it but BMW bolt pattern is almost drop on for 4 3/4. Youd have to check the diam of centerhole. I picked up 4 space savers in dual bolt pattern out of 90's cutl*** 4 doors. I guess the oems all bought from the same distributor so they'll go on fords or chevys. 25-26 in ht. Best set of project rollers ever, plenty of room to work around them. Need to find another couple for spares sometime
Thanks but the one that Skull Orchard had was 18" high and 4 1/4 inch thick, that is what I need, I only have a 19" space to put it in under my rear seat. Thanks for the offer though, really appreciate it. BB
I think i might pic this up. http://manitoba.kijiji.ca/c-cars-vehicles-other-T115-70014-space-saver-spare-tire-W0QQAdIdZ423264411
old chevy monza's had a small diameter spare that expanded when filled with air...i think they were 14" chevy 5 lug as the monza had a v8 for certain cars...saw one in the u-pickit yard last year - by the time i got back up the hill to get it - it was gone!....