Ethiopia, Bolivia, Isle of Man there's some more - take your pick.
MLS, Lativian, Iceland, Korean club - take your pick
Not really possible, these things are organized well ahead of time. The only "viable" option would be the CPL.
None of these are really viable but absolute desperate situations that imo would be worth the expense. Mine aswell put that money towards a U23 camp, and play any of those opponents you suggested.