Quick: What can I wash my silk in besides Woolite (can't wash them in it)?

I've got some silk underwear from WinterSilks.com. I washed some in Woolite Extra Delicates Care, and their quality faded. I e-mailed WinterSilks and they told me that they don't recommend using Woolite. They do have their own SilkWash, but it's on backorder until July 9th. What can I wash them in until then? Quick, before all the clean pairs I've got run out and I won't have any clean underwear!