Agambard, Thank You for your comments. Here's the link to Promo's original rifle.
https://www.milsurps.com/showthread.php?t=76219
Sorry but I won't be able to make any more of the brackets. You could use a Redfield 1903a4 mount with a shim/spacer to get the right height on the rear receiver ring. Also I am drawing up my mount and will make it available to the forum when I'm done. You might see if Chuckindenver would drill and tap your receiver if it hasn't already been done.