Just went for a quote, a place I've used before who do top work.
$1500, ouch.
The cost is due to the amount of prep and processes required to guaranty a quality finish that will last.
So, the TRD knockoff (requires paint) costs $500ish, then $1500 to paint.
The original TRD one cost about $1500 shipped to my door (no painting required).
Looks like the genuine item is the only way to go