I can not answer your question but have been thinking about trying a 30 barrel for my Leshiy too. I am the same way and would want a Edgun branded barrel as well.
I wonder how loud it is with the stock moderator?
A bit ago I found a place that had them online, but they were in Europe I think.
A month or so ago, when I bought my Leshiy at Edgun West I was also told the 30s were on backorder. I am really not 100% set on one yet so My plan is to just keep an eye out for one on Edgun West online store or maybe a used one in the classifieds.