Some guy gave me recommendations in this post: https://suppo.fi/comment/6839286
It bundles Undie-cuts which may comfort, appreciate or stealth your trunk. But it is unspecific in terms of measure- or requirements.
I wasn’t able to wear those within a shop and I didn’t receive any suggestions to my - initial - said problems.
The websites didn’t clarify any measurements so I neglected those. I do not want to require useless shipments.
Software.