Lets just say it wont be cheap at all unless you do it yourself!
Depending where you take it, your likely looking at being just shy of $1k by the time you add up the labour, gaskets, shop supplies and whatever else they try to charge you for.
Its not a hard procedure, just very time consuming, definately something that can be done in the back yard over the weeked with a few cases of barley pops. Good time to also do the KDP if it hasnt been done yet!