The High Standard Supermatic Military has some collector interest, they sell for about $300-$700 depending on model, condition, etc. Parts are generally NOT available.
The Brazilian M1937 is a standard Colt in M1911A1 configuration. There is good collector interest in most of the military 1911s, not sure about the Brazilian models. Any part that will fit a 1911A1 will fit your M1937, although any work you do to it will ruin any collector value it may have, and there are better, newer, cheaper handguns available for what you are considering.
Since both of these firearms may be collectible, why not have them appraised and see if you can buy something better with the proceeds of a sale and still have cash left over?