Removing rear wiper, need OEM plug part #

Need some help with this. I'm doing away with the rear liftgate wiper simply because i think it looks better without it. I've seen lower trim package XJ's that don't have the rear wiper and they have a plug that covers the hole where the wiper assembly comes through..........i'm trying to find this plug............any help on this one???

Rear Wiper & Washer 1997 XJ 1998 XJ Figure 23D-320
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Item 5 PLUG, Liftgate
5515 4939 1 1997 XJ​

55154 939AB 1 1998 XJ

Hope this helps. I have the 97-99 parts list on my computer along with the 2001 accessory catalog for the hard to find numbers. Just ask...

My 01's rear motor just packed it in, is there a different part number for the 2001 delete plug? thanks!

All 97-01 body parts are the same with the exception of the 2001 grill insert I believe (I think they all shared the same style/molding of grill insert in 2001, whereas there were subtly different ones for different trim packages in 97-00).