BBQ Vents - where to buy?

[DJBenz]

Anyone know if it's possible to buy the circular vents that are on kettle BBQ lids as a spare part? Seen a few on eBay, but with the shipping they come to a fairly ridiculous price for a simple piece of metal (in most cases). Have found a few stainless butterfly vents for boats, which are similar, but not sure if they'd allow enough airflow.

[eggtastico]

I got one you can have. want to PM your address & Ill get one in the post.
this is from a 57cm asda kettle I cannibalised for parts