11-28-2019 12:53 PM
Regarding your concern, Yes its possible buy OEM parts directly from Lenovo's parts and accessories supplier.
You can validate the part that you need based on the Hardware Maintenance Manual , under page 39 it shows as a Fan and Thermal plate assembly shown below
I've checked and it's available as shown on the link https://lenovo.encompass.com/item/11593368/Lenovo/5H40Q95820/.
I hope this helps and let us know how it goes,