Banana Tiramisu: What to soak lady fingers in?

If I am making a banana tiramisu but don’t want to soak the lady fingers in coffee, what would I soak them in? I was thinking some evaporated milk with maybe some banana extract added in?…but I also wanted to see if anyone had any insight or has tried to makes something like this before. Edit: or should I just use the coffee and cocoa dust like in a normal tiramisu? Would that taste odd? submitted by /u/Resident-Eye-8424