Where can I look up FRU#'s that aren't listed in the HMM?

[Glaurung-quena]

So I need a replacement lid for a T61. I search Ebay and there are a few T61 lids for sale. Some list the size of the laptop they came from. Some go the extra mile and list what looks like an FRU number for the part they're selling. Great.

Since there were three different sizes/shapes of T61, I look in the HMM to find the part number for the part that I need.

None of the ebay listings are using #'s that match the ones in the HMM. I checked all three HMMs, and the ebay listings are using numbers that don't appear in ANY of the HMM's. I guess Lenovo was not happy with one set of part numbers and came up with more, just to be extra confusing?

This is not just about T61 lids: I have run into this problem before with other parts for other thinkpads. Where can I find a reference that will tell me *all* of the different numbers that can be used for a given part, so when I need a part I don't have to guess if the listing I've found is for the right thing?

[RealBlackStuff]

It would be of great help if you tell us WHICH size laptop parts you are looking for:
- 14.1" 4:3 (T60/T61) here complete lids are interchangeable
- 14.1" 16:10 (T61)
- 15" 4:3 (T60)
- 15.4" 16:10 (T61)