I can think of several ways to accomplish this, it all depends on what sort of work you are looking to do while the bike is on the lift.
If you are just looking to get it up to comfortable working level, then a trailer rail fastened to the lift and the bike properly strapped would work.
If you are looking to do rear suspension work, then a front wheel chock and a center jack on the lift would prob. work pretty well.
You could certainly build a small platform out of 2X4s or such with 3/4" or 5/4" decking and have the surface area of one of the other motorcycle platform lifts. I would just be sure the platform is well attached to the lift itself.
There is a post on here somewhere, where someone built a platform to use with thier 2 post lift. That should give you some Ideas as well.