nitpicker- “a get is usually given then and there where and when it is to be given” HUH?? If you meant to write a get is usually written etc… I respond that a Get is kosher when sent with a shliach too.
I believe I addressed that last 2 questions you asked.
Regarding the first question, he can write it himself. If he wants the exact loshon he can google it. Its kosher b’dieved either way without many of the details.