Didn't realise how much is charged, (as opposed to how costly it is). I suspect there is limited millage (not but one or two mills that would weave it and very limited production, I would imagine).
40 BPS, or about $64 a linear meter (or metre, for our allies

), is about $58 per linear yard for 54" wide cloth.
For average full sized biplane minimum of 60 meters, or about $3800 without tapes, etc. Since those are sold by the meter as well, I am guessing $4500 just for materials and shipping to US.
What does dope sell for these days?