I looked at the cotton linen dk blend @ knitpicks and it is available in 30 color choices for only $2.99. /50 gr. So the price would be equal to the $6/100 gr. as you mentioned. Seems like a good buy if you are still looking to make this. I know this was quite awhile back, but perhaps you haven't made the skirt yet and still looking for the yarn.
And thanks so much for the info Priscilla.
And all the women who were wise of heart spun with their hands, and they kept bringing as yarn the blue thread and the wool dyed reddish purple, the coccus scarlet material and the fine linen. Ex. 35:25