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CPU Fan for VERY old PC

Tomorrow I will be looking at a customers 12+ year old PC whose CPU fan is dying (again).  Reportedly they have replaced it a number of times from a manuf named 'Kingston'.  Don't know if this is the memory Kingston or not.  This is a critical function PC (controls heat, a/c & alarms for a major portion of a major university.)  The PC is being phased out, but is still required for months to come.  I will have more details forthcoming, but wanted to cast a line to see if anyone may have sources for OLD cpu fans.  Sorry, I don't even know what manufacturer to specify:  Supposedly this is an old IBM PC that runs OS2...  And of course, the customer is VERY antsy!!!
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Thanks to all for the prompt responses.  The system involved is an OLD IBM PS-2 Model 65/SX.  The original CPU was a 486 DX2/66, it now has a Kingston Turbo Chip w/a fan epoxied on top.  Am considering removing the fan (Dremel tool/grinder to break epoxy???) and replacing it as suggested by TAPKEP if I cannot locate a un-used replacement...  FYI: the user is phasing this system out, but the budgetary constraints will stretch this out to 5+ years!!!!   Thanks again, any leads on Kingston TurboChips, let me know!
Does it look lite this?
http://www.rainbowpcm.com/turbo_chip_133.html

From the picture, i can't see whether it has heatsing and fan, or only fan. If heatsing is glued to CPU, you should remove fan only and replace with another. If you want just to oil it - you need to remove fan, because bearing can be accessed from another side.
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Exactly!  Well almost, this unit had the Fan mounted on the CPU as shown, but your picture shows a blue carrier (?) or something else under the CPU.  Mine does not have the carrier, the CPU inserts directly into the ZIP on the motherboard.
I didn't even get the chance to start the specific search and here is the answer!

So have you ever 'lifted' the fan off the CPU on these units?

I 'assume' that I'd have to pry it off or cut or grind, etc ???

So there is no heatsink between fan and CPU (you can see CPU beneath it)???

If fan is glued to CPU, it might be difficult to replace it :-/  You should be very careful to remove fan from CPU, not CPU from fan ;)
If you can't remove fan, you should remove central part of existing fan and fix new fan on top of the old one.

No, i have no experience in removing glued fans. Luckily they all were fixed to heatsink by screws. :)