Correspondence between Adam "WhiffWaff" and one of my closest gaming pals suggests that Green Eyed Miniatures will be pulling their 15mm Sci Fi range within the next few weeks once current stocks run out.
Might be worth picking up those 15mm Yetis or proto Ewoks sooner rather than later.
I've emailed Adam for confirmation and will let you know in due course.
"GEM will be taking a new direction in 2010 so the 15mm bits will no longer be sold by us once the current stock goes
All our unreleased 15mm greens have been sold off to various private collectors and a couple of companies."