I'd say there was more chance of Kelleher leaving than Leopold Wahlstedt being considered by Liverpool. If they ever had any intention of letting Kelleher leave this season I don't think they would have kept Adrian on.
More so if they were gonna bring in an outside replacement. They likely need Kelleher to fill the homegrown quota and teams are only allowed 17 non home grown players and Adrian takes up one of those spots. Don't think they would have wanted two keepers taking up spots.
Could always promote from within and that Keeper could well cover the homegrown spot but this late in the window I doubt it as most teams would already have their keepers sorted with the season soon.