I have seen repair kits available at auto parts stores for that situation but I have yet to use one. Let us know how you make out.
There is a Allen wrench screw on the back side of the plenum between the two gas lines that takes off a plate that holds the lines in. You can buy the replacment gas lines at napa and they cost $60.00. Not to hard to do but you have to take the top of the plenum off. about 6 screws and unplug about 3 or 4 electrical plugs. Not that bad it took me about 30 minutes to figure it out and i have never done it before. Saved me about $600.00.