Dealers can get prebent lines. I think the pricing is coming down. Someone recently told me all the lines for my pickup were around $80-$120.

As for the type of bubble/single/double flare. Look at what you take off to determine what is needed. It is also good to practice a little before you start. The way I figured out which fittings I needed was to take out my piece and bring it to the parts store. That's the best way to match up.