Hi Abhishake, welcome to the site! I have just ordered some wheels (lower anviles) from Hoosier Profiles in the states. He has a very good reputation. You may find this helpfull and a better option than trying to machine your own. I doubt you could make them for the price here in the UK. Here is a link to his website, he also sells them through ebay.
http://hoosierprofiles.com/Home_Page.html
David