No. I've seen some people cut out 1 1/8 steerer tubes (they are press fit, after the fork crowns are heated, and the steerers frozen), and install 1" tubes they cut themselves, but it's risky.
Marzochhi made some decent forks up to the 1990s that had bolt-on fork crowns, which could be replaced with other factory made crowns in different steerer sizes. I have one and it's pretty nice, a little heavy but smooth. I left the 1 1/8 on it, and I don't think parts are widely available for it anymore (springs, seals, etc).
Just remember if you are thinking about making your own pinch-bolt crown, that most shock stanchions for mountain bikes will not take too much pressure, and will slip out when they get any oil in there. Most of the bolt-on ones are also held by retaining rings and lips on the fork crowns.
Originally Posted by d_gizzle
Ok moonerdizzle, but can't you buy a 1 inch steerer and use that with some decent shock forks? I know I seen that somewhere,niw I'm off to find it!