Have you looked at a product called Raptor Liner? It is a do-it-yourself liner system. Name is a coincidence. Look it up.
It's real easy to use and looks as good as Line X.
I just did both sides of my ADD Inner Liners and the underside of my Boatec Fenders. Looks as good as anyone else's job. Cost me about $80.00, and still have enough left to do my rear wheel wells and smoother stuff.
If you're even a little mechanically inclined and have a garage, you can do it yourself and save a ton of money.
Either way, good luck!!! Oh, and post some pics when you're done.....