Unfortunately, links posted in this thread don't seem to work these days.
Could someone please answer where we can shop for Old Believer's handmade clothing at the moment?
If you are in Alaska, go talk to the pastors in the Kenai Peninsula Borough... (Kenai, Soldotna, Russian Village, Nikiski, Nicolaev, etc...) Note that Nikiski and Russian Village are also Russian Speaking and mostly Orthodox.
One can get a pattern by paying the ZJ Loussac Library to copy the patterns in the Alaska Collection; they cannot be checked out.
I'll note that if one is seeing rubashki or serafani outside of church, you're probably looking at an Old Believer community. There are small enclaves in various parts of Anchorage and Matanuska-Susitna Borroughs...