I am pretty sure that no fork will work without significantly changing your bike's handling. The handling will change because, in order to fit suspension in a fork, you need to increase the length from the fork's axel to crown (AC). Basically, early mountain bikes were built without the concept of suspension, so the forks had shorter axle to crown. Almost mountain bikes today are built around a longer AC, so even if they have rigid forks, you can swap on a suspension fork of the correct amount of travel (80 or 100mm if a rigid fork is available; full-suspension bikes often get longer travel). If you stick a suspension fork on, it will mess with your steering response (do some googling on fork trail) and raise your handlebars and bottom bracket. In short, adding suspension to your bike will make it ride worse, rather than better.