I would do this for you, however I have an R35 GT-R on the ramp at the minute with the engine and gearbox both out and waiting on parts from Japan and USA.
By what you say you have had a Concentric Slave Cyl. (CSC) failure, which is very common on this model so no point fitting a stock CSC as the same will happen again.
So the very least that you should do is fit an uprated CSC and as good engineering practice it would be best to replace the clutch kit as well.
At almost 70,000 miles I would recommend that you consider replacing the flywheel as well when it is all stripped down, however the OEM DMF costs circa £1000.00.
The way that you can get round this big expense, circa £1800.00 + labour, is to fit a quality uprated clutch and SMF kit which cost circa £1250.00 + labour which should be in the region of £200.00 - £250.00.