Well I didn't find the fiber I was looking for yet, but Rubbermaid container M yielded the most gorgeous roving, bought this summer at West Earl Woolen Mill:
I have about a pound and a half of the Loden and two pounds of the Sapphire to play with.
West Earl Woolen Mill doesn't have a web site, but here's their contact info:
West Earl Woolen Mill
130 Cocalico Creek Rd
Ephrata PA 17522
It is a little shop and fair warning, there's lots of acrylics stocked, but they did have some wool and cotton yarns in addition to several types of roving. Worth a stop if you're making a trip to yarn shops in the Lancaster PA area.