Gaggenau Model 232232CA stovetop - Monaco got it wrong.
Our propane cook top was burning yellow and making a sooty mess, and a friend who runs a restaurant equipment company was visiting us and insisted we look to see if the air/gas balance could be adjusted. It can't, and it turned out that the diffuser that sits between the cap and nozzle had been overheated at one point and was distorted.
Monaco claims on the build sheet that it is a Gaggenau 232232CA on the build sheet and gives a serial number. I spoke with Gaggenau and they couldn't help, but my friend decided to look for the model number because the parts we could find didn't look the same. Turns out it isn't a Gaggenau at all.
It is a Seaward Products 2277-1000, and they have been sold to Whale, except for the liquid propane products, and for them Sure Marine in Seattle has the parts.
$20 for the diffuser and $8 each for the knobs.
2006 Patriot Thunder C13 Allison 4000
2010 Ford Flex Ecoboost AWD