If you don't already know, the calibration constants are stored in one of the three NVRAM modules inside the meter. You should replace all three at a time.
Once they are replaced, you will lose your calibration unless you can salvage the contents of U132 with a programmer.
Also, the NVRAM are not socketed, but should have them added using high quality mill-max style sockets.
If you cannot save the cal data, you should add in the cost of a full calibration as a minimum. Plus, add a new DS1220Y, two DS1235Y, sockets, labor to replace.
Have you performed a self-test and ACAL ALL on this unit? A passing self-test does not guarantee a passing ACAL ALL.
One of my units failed ACAL due to a bad capacitor, but passed self-test all day long.
A passing ACAL does not mean it will pass full calibration, but a failing test probably means a full repair cost. Agilent's repair price also includes a calibration afterward.