IMHO, you want the Sanken cos11. Someone on here, years ago, did an extensive lav mic comparison and (if I remember right) concluded that the Sanken cos11 sounds the most like a boom mic and will match one.
It's what I use and I would concur based on the lavs I have used. Just make sure you don't place it to close. Remember, you want it to sound like a boom, not a lav; put it about middle of the chest area.