Thanks! I am in South Florida. So If anyone spending winter here with OEM remote - I appreciate if you contact me.
I have contacted few West owners in Florida, but out of luck.
Also, I have asked Logitech customer support how to "teach" Harmony remote without OEM remote. They are willing to help, but they need Pronto Hex codes for our remote.
I asked Dometic for those codes. And guess what - it is proprietary information, apparently. Thousands of brands that Harmony supports not proprietary, and Dometic is.
They offered though to purchase remote for mere 125 euros.
I think my other option would be to find non Westy RV owner with HEKI 4 plus skylight and working OEM remote.
Thank you all for offers and help! I successfully revived the remote by replacing IR diod (from donor TV remote) and re-soldering PCV main board from back side. Also reincerted microchip to it's base. And magically - it's working. So I am on to purchasing Universal Remote while OEM one is in working condition.
Thank you all!
UPDATE - while our OEM remote still works , as a backup, we got Harmony 665 universal remote. Was able to program it through software on PC and "learning" procedure with OEM remote.
Not as smooth as original remote , but it works!