Doc to the rescue................
If you don't get sorted with the vents, if you can send me whats left of the originals, I'll make you a pair of new ones exactly the same.
whats yer chosen matereal for making new vents
just fer the bling factor id be doing them out of brass plate if it were mine and polished up to look as good as rose gold
Yeah, brass is nice, but rose gold is gay in my book
I presume the fella is looking for original, so mild steel, but, I'll make 'em out tortoise shell if he wants
Oh there was not any vents the previous owner had put electric ceramic heaters in and unwired smiths heater!!!