I think the club should look at McGregor's absence as an opportunity to acquire a long term keeper for the club. At McG's age an injury like this could see him return as a much les able player, solid bench player but not 1st choice Premier League.
sven ulriech is bayerns reserve gk and looks really good and whilst our budget looks modest he didnt play much last season behind neuer. an ambitious bid could turn his head if he fancies a bit of first team footy. Failing that a loan bid to plug the gap.
I really think its the most important position to fill right now.