I will second Steve's advice. I recently emailed a seller of ex-hire kilts and asked if they were 'proper' with stabilizer, lining, cloth weight, UK woolen mill etc. I received the following reply:

These kilts are mostly machine made for the rental market in the UK. They are 13oz medium weight all in 8yards of 100% wool.

They have a part inner lining at the top of the kilts.


I then replied, in part:
still not entirely clear on whether the cloth is from a UK mill or just 'made for the UK market' and whether there is any interior reinforcement. I have had bad experience with inferior cloth from third world countries previously..

The reply:
We buy these in a large batch each month from Uk hire companies and assured these are made in UK.

The kilts are lined inside at the top for the first 6-9inches To me, this says they do not have stabilizers and are made in UK but with foreign cloth. I found a more detailed picture on their ebay site which included a leather patch belt loop with lion embossed on it which I believe is used by a major manufacturer from Pakistan.