I need to have some central air conditioning improvements done - one of which is to have the copper tubing that runs from the condesing unit to the air handler inside. I might not need the whole line replaced, but my dog has grabbed it and put teeth marks in it and also bent it so that it looks pretty crimped where it turns to go up inside the covering on the soutside of the house. I live in an old house and the air handler is actually in the attic. There are some other things I think need to be done, but this bent tubing thing seems to be pretty important. Can this line be replaced for a reasonable cost? Thanks