If I could have any right back currently playing or played in League 2, Austin of Darlo would be my preference.
Charnock is a left back. A position which we have already got a gem in The Iron Man.
Striker(s) would include Boulding; Abbot and Lowe all of proven abilty. If I had to go for a younger and untried at our level, loanee Robbie Brady from Man U would do me fine.
Interestingly, Sammy has never gone back to Man U for a loanee throughout his managerial career to date....I think!