It may be a while.  Last time I looked for it I could not find it.  I was ordering some bearings from a place back east and was $6 short of free shipping.  Ordered this little syringe with a tiny flattened and stiff plastic nose on it. You can push the rubber weather seal back with the nose, and squeeze oil/grease into the bearing.  Do this in a few spots and a noisy bearing is good to go.  I've used it on engine belt idler pulleys and a few small appliances.  Google the term "Bearing grease syringe" and I now see others have similar products.  It's the stiff tip that lets you momentarily displace a typical bearing's rubber weather/dust seal.  If I can find mine later, I'll post a picture.  If I can't find it, I'll use a syringe modified with the heat of a match to flatten, and perhaps sandpaper to narrow it to accomplish the same thing. HTH.

You made me curious. Could you please add a photo of the bearing lubrication device? I have a very noisy kitchen fan.🙂

Good point.  I opened the burner up last night and it looks brand new - zero soot or blackening.  Wonder if it was barely used since the vehicle has only 32k on it? I'll look at the fan/bearing very closely.  Even light use would not make up for bearing grease/oil that's hardened with age.  Perhaps I can sneak a lot of oil in there.  I have a device that helps lubricate bearings by pulling the tiny rubber seal back and pressurizing it. Yeah, looking for a quiet motor.....