Anyone know of a source for blank VIN plates rather than just knocking one up from a piece of scrap?

Mac

Trophy engravers. Most can do various sizes and styles.

Beat me to it there Hellfire!!
That's where I got mine.

Marcus

What needs to be on it.

Is it only up to a 17 digit identifier or does it have to have the words "VIN Number" or "Chassis Number" on it?

17 characters, mix of numbers and alphabetic, must be agreed with your local DVLA office.

My plate just shows the VIN.

David