About the same, less P&P. But the N.O.S. ones are rivited and old spec, so probably asbestos linings.Give Breen's their due, they did say it is possible to the job cheaper but they use very high quality material. Seeing the size of some of the stuff they keep in stock I'd trust their judgment. I only want to do the job once, so I'd rather pay a bit more for best quality stock. I also saw the effect of Asbestos on a friend so I would REALLY like to avoid contact with the stuff. Incidentally they rate the lining at 4.8 mm