Not a lot of options unfortunately.
Find one in a bone yard or an owner who has one they are willing to sell, or is parting an 05 out and will sell you the FCM.
Or you may reach out to one of the online computer rebuilders like FlagShip1 and see if they can rebuild yours or make a recommendation as to who may can.
https://www.fs1inc.com/PS: You could also try posting your request to locate a good one over on the FaceBook Jeep CRD Group. Lot of Jeep Liberty diesel owners worldwide on it.
https://www.facebook.com/groups/libertydieselsBest of luck on this!

_________________
Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited 
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve