These can be made in RWP . Material is cast iron . called "daigi loha" by local furnaces. ( they add a bit of nickel & chromium to std cast iron to make it less brittle)Contact Nikko , Mehmood or Jamil in city saddar road ,rwp . Should not cost you more than 2-3k /set . For M38 , ready made might be available in 2'' width . Install original studs only whether LH or RH threads.