i don't think the ferret playpin will work.. LOL
i let stiv model this for you, the spacing is to big

I also have a picture of my rabbit with one.
the spacing for all models are 1/2 inch - 1 inch
However, if you can figure it out, it's gonna happen for me to! you know how many of these play pins i have? A LOT i have 4 ferrets and 2 rabbits and both use these playpins