Rear door locking mechanism

I have got a rear door and need to replace the locking mechanism.

Any advice on where to but one and advice on fitting?

Does a new one normally come with all the bolts etc....

I have a spare barrel when I replaced my front ones....does the same barrel fit?

tried L. R. Series - specialists in land rover, land rover series and range rover - gearbox, axle, transmission parts, spares and major units ?

Yeah, seen them on paddocks etc.... just didnt know if they includes all the necessary bolts and plates to hold it to the door.

I got one via the dealer I bought my 110 off, as the lock was faulty. Took less than 10mins to replace, as the old unit simply unbolted and was replaced with the new. Had to recycle the plates and nuts/bolts to fix it in place, and the lock barrel from the front doors also fits (took the chance to replace them all so all three match).
A quick go on ebay and google will trun up plenty, £20-30 seems the going rate.

Thanks,

Annoyingly the plate that was on the outerside between two of the bolts had rusted through and all bent, was hoping it would come with them. poo.