DT E-11D barrel

[Catevari[TX]]

So I've a Branfuhr studio's e-11d. Absolutely love it, but am forced to do some replacements. The front folding stock warped and is ruined, so I'm printing a new one from Tom's files I purchased. 

Now, I'm also upgrading the barrel as I want natural heat bluing. I've just bought steel 1 7/8" tube,  16ga. I was wondering if anyone has a barrel pattern for tracing out the details before I start cutting. Could've swore I saw one before but cannot find it now. 

If anyone can help, I'd appreciate it. What I remember was a flattened out print with the details you wrap around something, like PVC, and cut the details.