Boxers (and pj bottoms) w/ functional opening fly for G8/9M

There are several boxers and pajama pant sets for G8 and G9 males that all have the appearance of a buttoned fly, but none of them have morphs to actually open. The only classic style boxers made with that functionality to my knowledge are the Simply Casual Boxers for Genesis 2 males from the Daz store. Would love to have some updated options with this basic functionality!
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Is this something like this you're looking for?
Genesis must be gendered for open and closed versions?

Genesis must be gendered for open and closed versions?

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Not quite. More like these, the genesis 2 boxers I mentioned:

I'd like to see some similar ones. High quality textures (with some solid and plaid patterns) with waistbands like the intimates sets that get released (that all have visible but non-functioning flys). I'd love a longer pajama pant version as well.

I'd like to see some similar ones. High quality textures (with some solid and plaid patterns) with waistbands like the intimates sets that get released (that all have visible but non-functioning flys). I'd love a longer pajama pant version as well.
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Thank you, I understand better what you are looking for.
I made 1 shorts with zip that works
https://www.renderhub.com/dorothee237/sorts01-zip-open-for-g9m
https://www.renderhub.com/dorothee237/shorts01-for-g8f
also overalls and dungarees with zip
https://www.renderhub.com/dorothee237/gas-station-overall-long-sleeves-bundle
https://www.renderhub.com/dorothee237/dungarees-full-open
I made 1 shorts with zip that works
https://www.renderhub.com/dorothee237/sorts01-zip-open-for-g9m
https://www.renderhub.com/dorothee237/shorts01-for-g8f
also overalls and dungarees with zip
https://www.renderhub.com/dorothee237/gas-station-overall-long-sleeves-bundle
https://www.renderhub.com/dorothee237/dungarees-full-open
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! REPORT