I know that you can use 700c wheels on a bike designed for 27", so it seems like you could make it work with a 27" fork...but I haven't tried it, and I don't know if it would affect the handling.

You might also keep an eye out for threadless forks, although there aren't too many of those available in 1" size. You would need to get a new headset and stem, but that might open up a few more options.