If the lathe has a dovetail bed, there is the risk of pulling things slightly off centre when clamping up the base. But adjusting the three steady feet should accommodate that.
In the past, I made a Saddle Stop for a dovetail bed Myford ML4, so something using that as a base could be a starting point
Possibly a dovetail base to carry a modified steady, that is available, from a lathe of similar size?
There have been articles, at various times, in MEW about making fixed steadies for various lathes. So maybe, adjusting the scale of one of these designs, to fit the lathe and the different mounting foot, may be the way to go.
Howard