Master Cylinder Piston Retainer

Help me locate this piece

Looking to purchase the piston retainer that is held on by two bolts ( also serves as the rubber boot attachment) on a 67 to 70 master cylinder.

I am told that early single reservoir master cylinders used this same retainer.

If you have one for sale or ? please contact via this board.

If you know the part number or where to find one please pm

Thanks