Marzocchi, as far as I know, is the only major manufacturer supporting the 1" market. PhatTire.com shows the MX comp available with a 1" steerer, but there may be others that can be ordered. (PhatTire.com is the only site I know that consistantly has featured Marzocchi 1" forks, and I purchased one from them about three years ago, but I'm quite sure any shop or most online retailers can order them).