It's virtually impossible to find a good confo. pup in a shelter.
Even if you did, shelters spay/neuter their dogs before rehoming them (although you could compete in those conf classes for altered dogs for fun), and on top of that I don't know of any that will transfer ownership of papers (if the shelter even receives them) over to the new owner.

I don't agree with breeding for the standard ALL the time. Generally yes, but breeding for working ability is good too.
And again what is wrong with breeding to the standard and for working ability?? When you start seperating the two it means trouble for the breed IMO.