I've heard of Chinese 1911's that were very very highly modified to accept Tokarev ammo. Never seen it done and couldn't imagine you are saving a lot after modifying magazines, feed ramps, extractors etc.
A tokarev is a browning design - how much are they? $300 for a real nice one.
If you look on GB or Auction arms don't forget to look at the CZ-52 as well.