Get the water pump and the kit changed too.
Why?
Its not mission critical and can be done without touching the SCARY timing belt, just the aux.
Jj
Some people do it as it's just the added cost of the pump as there is no extra labour etc to pay
not charging labour for swapping the waterpump? eh? you sure, they're a bit of a tw*t, i charge an hour plus you have £45 of coolant on top