Dometic bought Atwood.Some things are no longer available.F.i. cooktop for Roadtrek 170 .( My RT is 1997 but RV place have trouble finding cooktops even for 2010 RVs).
Manufacturer of alcohol Origo stoves was also purchased by Dometic, the killer company, and killed. Likely a philanthropical action by Dometic to prevent folks buying bad stoves and buying the best in the world Dometic ones, sorry I am venting.
Origo was used for years especially on boats considered to be safer than propane but now used prices are astronomical.