There is another post somewhere on this forum that asks the same question and from which I got the answer to my problem, as Autel seems scarce with parts for the
Lite+ at present.
The answer is DJI, surprisingly. Or, eBay.
Let me explain.
The DJI Mavic 2 Pro or Zoom use the same dampeners as the Autel
Evo Lite+
I know from first hand experience as I lost one of mine and ordered the DJI ones from a seller on eBay (base don the psot I read on these forums). They fit perfectly, but can be a bit fiddly to install (get some tweezers!). Mine where a different colour, but that doesn't bother me.
You will normally get the mount as wel, but there will be 4 dampeners, the important part, so you'll have some spares too!
In the UK it cost me around 25GBP (26USD).
EDIT: I should also add that they are readily available on eBay, so no supply problems. Hopefully in your country it is the same.
Good luck and happy flying!