Dixie Chopper is not showing a 2016 model but there is a 2017 one. Using that IPL the Idler is 4356089.51 superseded to 684245 ASY,IDLER ARM W/ ZERK.
Are using the superseded PN when looking for the part as the old part is NLA?
One place that say they got it is
ASY,IDLER ARM W/ ZERK
et-parts.com