When we see the frame we can give you an accurate estimate. Forks Most pre-war motorcycles use girder or springer front forks. Both styles are repairable. Girder forks are commonly found on British motorcycles. Besides being bent out of line they often have worn shafts and bushings.
Shafts are invariably bastard sizes and incorporate both left and right hand threads.
Replacements are unavailable so new ones must be fabricated. Springer forks were often utilized on American makes. Rocker arm bushing-wear is a common malady. When sending spring forks for repair be sure to include the top crown.