I have just such a domain.
You pick the handle you want (ex. "name.blksky.social), and send me the DNS verification value, and I'll get you setup.
Updating your handle will keep all your posts.
As changing your handle does vacate your existing"bsky.social" handle I recommend you create an alt-account to squat on your old handle and points to your new "blksky.social"
As changing your handle does vacate your existing"bsky.social" handle I recommend you create an alt-account to squat on your old handle and points to your new "blksky.social"