Long armed 90 degree picatinny

[CAESAR]

I have this
Amazon product ASIN B007AO0SPQView: https://www.amazon.com/gp/product/B007AO0SPQ/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1


Problem is that I can only mount it under the scope and then the extension is not far enough clearance from the scope....
Any Ideas for longer arm?

 

[50wt]

Cut, fill, weld.