Number 1 cake tin

[zebedeeboing]

Can anyone recommend one or have one they want to sell on?

use normal rectangle and cut a number one - save yourself a fortune

Was going to say the same thing. I have a book I got in sainsbury's shows you how to cut out all the numbers. Don't have it to Gand but the number 1 used a largish square cake tin and was cut and pieced together as a '1'
If you really don't want to do that google cake tin hire I have done this in the past you pay a refundable deposit.

Check your local cookery/kitchenware shop if you have one - most have a massive range of tins for hire. Ours charges a refundable £20 deposit and just £2 per night hire - I've never had to buy a fancy tin yet because they have so many to choose from.