Hi Advacate.
Not sure which model of Hi-Standard your shooting, but the scope mount I've used in the past (1980's) was made by Jasmar. It simply replaces the left hand grip panel on my Victor and clears the sights. NO MODS to gun! :grin:
Went back to open sights when my old red dot sight took a dump :cry:
The address on the mount is:
Jasmar Inc.
955 Milstead Wau
Rodchester, N.Y. 14624
716-436-0058
If interested email me and I can shot a digital photo of it for you! You might even be able to talk me out of it real cheap!
doc-and