That, sweet child of the evening's mists, depends entirely on what make and model your tumble drier is.
I hate to disillusion you thus but, notwithstanding my children's expectations, I am NOT psychic.
Find the make and model, then do a Google search for spares suppliers.
I find espares and Ransoms are often useful
The bad news is that you will need to think for yourself.
Anon, October 2016