Might be a silly question, but would Alpaca not work? (my dh's aunt raises them, I know I've seen them white! - and no, you can't all beg me for fiber from her, I need to get some for myself first!
Knitting homeschooling mom to 3 kidlets
Bayerische Socks by Eunny Jang in Knit Picks Risata (for ME!)
in queue: Swirl glittens; lacy raglan for me; new cabled sweater for dh