I converted my R1200RTP back to civillian, this was my parts list which I eventually sourced outside of the UK from a country that doesn't use RTP models, that way prices are not at a premium.
https://www.ukgser.com/forums/showthread.php/507664-A-chance-to-play-with-my-R1200RT-P?p=5379958#post537995846547699903 Case Holder Left
46547699904 Case Holder Right
07129904588 M6X16-8.8-ZNS3 We need 8
Rear seat pod lock release £20.00
46547681144 Luggage rack
46547681147 Left rear handle
46547681148 Right rear handle
46712310403 Foot rest rear left £25.00
46712310404 Foot rest rear right £25.00
46717664225 Foot rest rubber We need 2 £ 8.00 EA
46627692858 License plate holder £45.00
46627682759 Rear tray £25.00
71607694184 Rear mudguard £30.00
This is the list of parts I purchased:
1. Seat heated, black rear (part no. 52537683652)
2. Adapter cable for seat heater, rear (61127688147)
3. Rear seat lock (?)
4. Luggage grid (46547681144)
5. HANDLE REAR LEFT (46547681147)
6. HANDLE REAR RIGHT (46547681148)
7. Pannier holder left (46547699903)
8. Pannier holder right (46547699904)
9. Footrest rear left (46712310403)
10. Footrest rear right (46712310404)
11. Pin x2 (46717654258)
12. Circlip x2 (07119901545)
13. Footrest rubber x2 (46717664225)
14. Pannier back half, with fittings left (46547714437)
15. Pannier lid left (46547679271)
16. Pannier back half, with fittings right (71607699902)
17. Pannier lid right (46547679272)