The only thing a framebuilder could do is build up some brass inside the end of the head tube and ream it out to the proper size.
A block of stamps the size of a ream of A4 paper would be worth a quarter of a million pounds - and you could just put it under your arm and walk away.
বর্ণমালা অনুযায়ী ইংরেজি শব্দ ব্রাউজ করুন (A-Z Dictionary):