Highline and cheap don't even go in the same sentence. If you want cheap, go with smittybuilt. If you want highline just do a basic search. TNT, metalcloak, poison spyder, and so on. Lots of great looking options around $600 and up. Don't forget you need to mod your hood or purchase one for the highlines.
You can get the Smittybuilts for around $350. But then you need to paint or coat them. The e coat they come with is notorious for flaking and rusting.
Good luck with the search! Maybe searching eBay might help you find used or resale units at a reduced price..