I wouldn't wait - I would drive it home from the dealership and find a replacement ASAP - Certainly within the next few days. If you don't it may leave you stranded one day and that's not something you want to happen
There are lots of ways to go here. Reread this thread, find what you want and get it done. Worst case, you'll buy an OEM size replacement and change it out yourself for about half what your dealer wanted to replace it
Don