Have you ever shopped here? Checking out tartan fabric.

[M. A. C. Newsome]

Actually they do 8 oz plain weave , 10 oz twill and will weave 16oz twill if asked,, in fact they wove the St Ninian for Matt, obviously as a special, but still appears to be available on their website

True, they are capable of weaving any weight cloth. Thank you for the clarification. The bulk of the cloth offered on their web site, which is plain weave, is the 8/9oz spring weight. This is what I was referring to, in response to the question of what weight the fabric was.