As far as I know you can. If you go on a non match day or well before KO go to the main ticket office. They should ask how you want your ticket - physical or digital. For priority points you need to allocate the ticket to a non-season ticket account by giving them the name or number of that person. They never used to charge me a fee neither if I was buying for others, unlike online which is now £1.50 per ticket. You can park outside the ticket office for free and go into the club shop too. Nowadays there are small queues or none say on a Friday afternoon. I do think they have reduced the ticket office opening hours though.
Leicester will want 2,800 or as many as they are allowed - Brum had 2,500 allocated if they wanted them. That means Boro will be limited to around 28,500 tickets - we sold 26,400 home tickets for Brum game and 28,200? for Millwall home game this season. If we do well over the next 3 games it will sell out.