Many of the 1199 & 899 parts out there are interchangeable. During December & 1/2 of January I spent a lot of time converting my bike into a track bike for WERA competition racing (with the help of my Speed Shop ttrno.com).
Here are my add ons:
1), Termi Slip-On's w/ ECU flash
2). RearSets are Light Tech -
LighTech Official Store | DUCATI PANIGALE 1199 2012+ Adjustable Rearsets | Worldwide Shipping LighTechUK.com. Although it will work for both the 1199 & 899 I had to make minor adjustments to get it to work with GP shifter on my 899
3). Ducati Racing Fuel Tank Filler Plug - Made for the 1199 & fit perfectly on my 899
4). Ducati Racing Tail Guard Kit - Made for the 1199 but fit perfectly on my 899
5). Ducati Racing Belly Pan - Made for the 1199 but did not fit perfectly. The ttrno speed shop made modifications to the belly pan so it would fit without taking out the radiator fan.
Mods before next race:
1). Change out front sprocket to a 14
Upcoming Mods:
1). Complete the race fairing upgrades by replacing R+L side & headlight fairings