Replacing stolen tail lights / indicators

pcjms

I need a pair of tail lights. I've had them stolen so don't know the exact dimensions. They're for 2001 Eccles moonstone caravan and are wrap around type. The thieves kindly left the wiring intact.

The dimensions of the gap left are roughly 410mm by 170mm. The distance between the fixing holes is 315mm Length and 135mm height. Does anybody know what I should be asking for or where I should look - this is my first year with the caravan.
this is also my first post so I hope it's in the right place. Apologies if not.