The Trucklites are on ebay for $330 to $360 a pair pretty regularly.
FYI, Grote and GE both make DOT approved LED headlights for the H6054 application. Same price point. There's another vendor on ebay selling a DOT approved headlight, but I don't know much about them, and their price point is pretty close to the others so I'm saving for the trucklites.
It's generally plug and play with any of these if you've already got the sealed beam style headlights; otherwise you'll need to change the headlight bezels and a couple of clips as well.