Enco Mill (9x49) XY ballscrew cradle???

Hello,

Does anyone have information about an X/Y ballscrew attachment
housing for an Enco 9"x49" mill. The assembly which captures the X
and Y ballnuts and attaches to the saddle.

The Bridgeport Series 1 casting is about 1" too short in center to
center distance between the ballscrews. It is made of cast iron.

I am in the middle of my first conversion and any help is greatly
appreciated.

Thanks,
Joel