On crowns

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Hope somebody can help me with finding them and perhaps we can at least try to make kind of database. I acquired a 22409 without crown and hope someone can help me find a decent replacement. Originals are very rare and due to the specific shape replacements are not a walk in the park as well.

Attached some pics of the - what I think is an original - crown of my 224105. So: diameter 6.7mm and depth 2
5mm. Anyone a pointer?

 
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I know my Railrouter Chronometre doesn't have an original crown. I would like to get a rplacement but have no idea what the specs are. Signed and domed (starting slightly in from the edge).
857697ea-65ac-487a-a5da-700fab038ccd
 
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I don't have a spillman on hand to check the crown specs. I would think it's not the easiest crown to find. The only advantage is it's unsigned, and was used across many brands, so it could be sourced anywhere potentially.