Get some line, a bending tool, flaring tool, and make them yourself. It's not really as intimidating as one would think, especially on these old trucks. use the original lines as templates to make the new ones. you may have to use an original fitting or two (GM is bad about odd size fittings) or cut and flare a line to fit, but with some practice on some scrap line, you'll be making flares like a pro. If you need to see the process, I have a vid up on YouTube.
