Likely useless, possibly wrong, but mildly interesting all the same.
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Part # FRU Part name
93P5674 93P5675 LGD 12.5HD IPS
45N2036 45N2071 KEYBOARD FRU
0A72290 04W1423 Planar (Core i5 2520-M w/ AMT)
42T4866 42T4865 LG 6cell 2.8Ah
Yes, the keyboard FRU above is the same as the T4x0s(i) FRU. I suspect that this might be a sign that Lenovo is trying to increase the number of components shared between product lines. With the X220 getting wider it might be able to fit a "full" keyboard. Either that, or the FRU numbers aren't final yet, and 45N2071 is just a placeholder -- that's also a distinct possibility.
Also, I believe the above answers our questions about who makes the IPS panel. Assuming it's accurate, LGD would mean that LG is the manufacturer.