Just in case anyone missed this, like I did, all the Guild Ball minis are back on sale:-
https://steamforged.com/en-gb/pages/guild-ball
Unfortunately, they're still not selling them individually (Apart from Lucky), so to get all the new Captains and Rookies I'd missed I've had to re-buy all the Veterans that came out as part of the "Union in Chains" event.
On the plus side, if you're completely new to Guild Ball you can get the starter set for free, as long as you can print it all out yourself.