Unfortunately yes, the first edition sold out and we are unable to print more at this time due to economic factors. You can order a print-on-demand deck here, though! https://www.drivethrurpg.com/en/product/497461/the-price-of-coal
Yeah, I figured it was for economic reasons. To be honest, I found a copy on ebay, but my package got lost during shipping, so I was about to give up... I reckon that the print-on-demand ain't gonna have the sober yet amazing box of the first edition, but, as far as you know, are the embossed cards more or less the same as the original?