Don't do that # 3, you will be sorry later.
Just about any fuel pump should be ok.
The needle and seat in your carb shuts the fuel down to what is needed and when it is needed.
I'm surprised you are having problems with the pump that comes with the kit.
Try to find a lad on this board by the handle of JeffK.
He is the blower gentleman.. If anyone knows, he is the man.
Here is a link to his generic parts.
http://www.jkozloski.com/generic_parts.htm