WT BUY a pair of "Slip Streamer floor board inserts for rider, 2013 FLHTUC, Harley does not make this part any more, a good used set is ok..
I saw an aftermarket chinese pair on ebay, but, there gone.

 

got pics?
you need to be more specific.
maybe this - https://www.hdforums.com/forum/touri...rd-insert.html

 

You want the whole board with inserts or looking to put the streamliner inserts into a "D" shaped board? I have a couple sets of boards with inserts... easy swap

 

I'll get back to you w/ a Harley Part # right out of last yr's catalog, so there's no mistake made.

 

the Harley Part # for the floor board inserts is : 50500093, it's on page # 582 in the 2016 catalog...