Lyman 35 reciever sight

[buzzbomb]

Does anyone know where to find an old Lyman model 35 reciever sight?  That's the one that was made to fit on the bolt stop of a Mauser 98 and tighten on with a set screw...no drilling or tapping required.  The odds of running into one now a days are slim (I only go to one gun show a year).  They probably havent been made in 50 - 60 years.