Race numbers non paint damaging

[dig123]

Hi I am looking to do hill climbs in in pre war car this year and need race number but don't want to have the roundal
/numbers on the car on the road. I have seen in the US they do vinyl numbers which are easy to peel off and reuse but can find a UK seller. Any one know where I can get some in the UK.

[dig123]

Oops should have mentioned the car is aluminium, makes it go faster apparently.

[dig123]

The car has no windows, or doors. I was looking at this company http://www.gochecker.com but not sure the size is correct for MSA was hoping someone had already used something like this in the UK. I'll have to keep looking, thanks for the ideas.