I think Brian Wards in Brundall do them
You could have it engrave in trafolyte by P J Drew in Southampton. They did one for me.
How would you do the text and other artwork on it?You could do it yourself with a piece of black perspex and 3 hole saws of the required size.
How would you do the text and other artwork on it?

They do indeedI think Brian Wards in Brundall do them
If you would consider using plastic I would suggest this company:
Signs and Labels Direct - Engraved signs made easy
they have an excellent on-line tool for you to design your panel - and very quick turn around. I've used them a couple of times. Good value too. I was also able to upload small graphic images to add to the design.
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