Sorry about this but I urgently need to get hold of a flue guard for a Rayburn flue outlet and it needs to be at least 395x395x410, as in 410mm deep. I can't find anything even close to those kind of dimensions. There are now kids playing where this flue outlet is so it's imperative that we get something fitted to cover it ASAP. Anybody of you good people know where I can get hold of such a thing, preferably online? TIA