PB Expansion Discs still shipping?

[Scharlemanje]

Wondering if those are still available somewhere? If not as physical shipment then perhaps as downloadable content or smth? In particular I'm very interested in the Smolensk LCG for 29th Mot Div. I myself have got PB#1, but wasnt there numbers 2&3 released as well... unfortunately, can't find them on new blitz pages.