Need help buying new fan for T42

[q21]

Hello forum,
The fan on my trusty T42 (2379 RFU 14.1 inch) runs full blast all the time, is very noisy, and also makes the pulsing sound. I think it is high time to change it.
The problem is, I would like some confirmation regarding the right fan. Searching on this forum, it seems that the 41W5204 (long M10 fan) is the one recommended, but I have conflicting information:

[1] The fan that I currently have has a yellow sticker that says ''91P9251 | FRU Fan Long 91P9252 | Made in China Furukawa Electric Co., Ltd'. (Two FRU numbers. )
It looks like a long fan in that it extends over to the GPU (I'm guessing).
Unfortunately I can't find neither FRU or my model number on Lenovo's website.
- System service parts - ThinkPad T40, T40p, T41, T41p, T42, T42p

[2] After putting me on hold for 20 minutes, Lenovo customer service says that the fan I need is the 26R7860, which is a short fan.
Maybe this is because I had warranty service done on my mainboard a few years ago, I have no idea. (I had the 'Pick up by the corner; computer dies.' issue)

And I still don't know what the difference between the plain long fan and M10 long fan.
Am I good with the 41W5204?

[FTC]

Hi, just pck any of the long fans and don't worry. Long fans can be perfectly used in T4x that don't need them.

[q21]

Thank you!
It has more than doubled since the last time I checked.. $80.65 through IBM Maintenance parts