Hey Scrappy.
I'd like to purchase 6 pcs of the shrouds, but I need those 5 inches not 4".
Do you have any?
I read somewhere that the 5" and 6" can disperse the heat way better than 4".
pls advise if you have any 5" or 6" shrouds?
I do not. Please check with camelhackx on ebay as he is very good at it. I am only reselling exactly what I bought from him. I will not make money off his designs or patterns. I simply want to sell what I have.
Scrap'
To add to this, Watch Camel's youtube and you will see a 4 inch is just as efficient as the 5 inch due to the fan. It's still 120mm... no matter how big the opening.

If your in the US, stick with the 4 inch. Forget the other BS you read on the intraweb.
Scrap'
Thanks S.D. for your reply.
The 5" or 6" shrouds were recommended by this good felllow - Raymond B. in his thread "Ducting", located inside mining support thread.