mso489 - Hi Tom, few points of clarification on Brigham's Rock Maple Distillators:
As Olkofri has pointed out above, many do not use the inserts at all; therefore, and in that case, there is nothing to buy and keep in supply - as the pipe would now be used like any other non-filter pipe.
If one wished to filter their pipe with a paper filter, as opposed to the rock maple distillators a 9mm will not fit a Brigham, but a 6mm may - I do not know, as I have never tried it myself.
As far as using the distillators is concerned: They are much more durable than the standard pipe filter, and taking a wet distillator out of a pipe (after 1/2 dozen or more bowls), and wrapping it tightly in a small piece of paper-towel - where the moisture and tar is then transferred from the distillator to the paper-towel as the distillator dries out in a day or two, one can get about 20 changes out of each distillator before they become dark brown and no longer able to absorb.
They basic key to this trick is to not let anyone distillator get too nasty before a rotational change, and swapping it out with a fresh (or dried-out recovered one) each time you finish smoking that pipe for the day. This takes about 10 seconds to perform the change-out.
It's a very easy matter to keep a rotating supply of fresh, drying, and recovered distillators on-hand.
In action, out of standard package of 8 distillators ($3.00/pk at P&C or SP, etc), one fresh would be in your working pipe, one wet one would be rolled up in a small piece of paper-towel drying out, and one dried one would be ready-to-go when next needed.
So, if you get 20 changes out of each distillator with this simple paper-towel method - YMMV - you might get 60 changes (60 changes of 6 bowls per change) or, 360 bowls smoked, before you would have to start 3 brand-new distillators out of the new box, for another 360 bowls; and still have 2 brand-new distillators remaining from the box of 8.
This is highly cost-effective; and you generally use less pipe-cleaners as well.
You are correct about the pipes in the line no longer being made in Canada. Brigham uses a vendor in Italy for it's lower-tier lines, and France for it's upper-tier lines.
Brigham's US distributor is Sutliff.
So my friend, there you have the whole story on the Rock Maple Inserts, et al.
I hope that helped answer your questions - Sherm Natman