I find myself in a comparable situation, so, im planning to order some abena M4's from Amazon, usually the price is like 25 - 30 USD per 14 diapers, I think is a good deal.
The most "discrete" diaper in my opinion and with a good absorbency are the Tena Maxi with plastic cover. Usually I wear them with a yoga pants over it and works pretty good.
The Mexican Goodnites are made in the US. It’s interesting because a few years ago, we had the white original version for years, while in the US, they had the unisex version.
I'm in the same boat, looking for replacements this looks pretty interesting.
The 48 diaps case cost is 74 usd right now and are made by Rearz.
https://incontroldiapers.com/incontrol-inspire-original-incontinence-briefs/
I normally I wear a yoga shorts over the diaper (especially with ABDL diapers) to reduce any noise, and my pants usually are loose.
On the last weeks I tried to dont think on that, and really helps! At least to not be too obvious you know.
Good luck!