To the best of my knowledge the only place I have ever heard of that carries the Ingvar Alm scope mounting base is Tim McMurray at Mac1 Airguns... As you probably know I am kind of biased when it comes to scope mounting bases for Benji/Dans and in my biased opinion the IA base is the second best base that you can buy for your Benjamin or Sheridan rifle... If you are considering a scope go with something bigger than a 4X, at least a 3-9X, My guns have 20X and 24X scopes on them.... I can shoot things others can't even see!!!! I bought a refurbished 392 for $100.00 from R&L Airgun Supply in Colorado. My rifle came in a sealed carton, has a nice grain to the wood, works perfectly and was almost perfect in appearance..... Good luck with yours!!!! Greg