[[ GXB20 Driver – Homemade Constant Current Programmable XHP50 Single-Cell Boost Driver! ]]

That looks brilliant, just what I’m looking for…!

Is this driver available for sale already? How can I purchase a couple one 17mm and one 20mm…?

Should bump this with the same question.
Is it (GXB20 V2) available for sale anywhere?

Sadly, no.
There’s a similar driver from MTN but the last time I checked they were out of stock:

Thank you for the point. Agree, it’s sad there is no option to get subj.
I found only H1-A as an alternative (need 20 mm diameter) and it is too tall (7.5 mm).