It has been years since I have used one of those.
I remember that the feet bolt on, So I would either make some type of structure from Angle iron and bolt to the tub in the old space.
Maybe go to an Ornamental Iron fabrication shop and see what they have in the line of pre-cast iron legs for things that might bolt to your tub.
ED
I remember that the feet bolt on, So I would either make some type of structure from Angle iron and bolt to the tub in the old space.
Maybe go to an Ornamental Iron fabrication shop and see what they have in the line of pre-cast iron legs for things that might bolt to your tub.
ED