Hi! I would like to make teh Flowerpower hat from the fall issue of knitty.com It said it was made with Filatura di Crosa 501 yarn (100% superwash Merino wool). There are lots of colors needed (6 in all!) --and I can't seem to find a resource for this yarn. I did find Swish DK from knitpicks.com --and it seems like it might be a good substitute. I'm rather new to this knitting -and am never sure about substitues. So I was wondering if anyone could tell me a resource for the Filatura di Crosa 501 or a suitable substitute. Thank you so much!