It's always something, Looking for a good set of IMR 22650 batteries....

Has anyone seen any quality IMR 22650 batteries for sale anywhere ?

You most likely won't find them.
This is an odd size as it is. Throwing it into any search bar along with anything related to finding a source either says they have no real use since 18650's dominate the markets or that the 18650's are better than any of these that were available.
There have even been a few posts here on LPF about these and people trying to source them and the 18650's with a sleeve seems to be the workaround for this size.

Why would a company invest R&D+Capital into a battery size that can easily be replaced with a common size that the R&D is already done or being done and the capital is already invested to churn them out?

This is a case of "why would we make those"
The market is driven by demand and there is no meaningful demand for such a battery especially not in the IMR chemistry which is somewhat newer.

Odds are that if you manage to find any of these cells they will be old stock and much worse than anything modern in 18650.

They are out there but I'm just having a hard time getting my hands on a set......

This is the only place I can find them listed anywhere that actually shows the battery with 22650 stamped on it.
All the other listings threw 22650 in the tags on either 18650's or 26650's.
20W+ 589's exist as well. all depends on how badly you need one and how deep your pockets are.

https://www.alibaba.com/product-detail/Rechargeable-LiFePO4-22650-Battery-1600mAh-3_706516177.html

https://www.alibaba.com/product-detail/Li-ion-battery-22650-for-solar_2008089571.html

In my honest opinion, this does not seem like a battery that many of exist. Even those two are a bad composition and probably old stock.
Seems more likely to order them, receive either 18650's or 26650's and get told "you pay return shipping for return" on them for being the wrong battery.

I found some 22650, LiNiMnCo Rechargeable 22650 Cell: 3.7V 2500 mAh (9Wh, 3.75A rated) LiNiMnCo Rechargeable 22650 Cell: 3.7V 2500 mAh (9Wh, 3.75A rated)

I ordered 2ea.....

Update - and I finally got HobbyWow to ship out a set of Feiyu Icr 22650 3000mAh 3.7V Li-Ion Batteries which have a continuous maximum discharge current 10A