I've been looking to replace my Stella for a while now - love the warmer light and form factor. I've had it back ordered in my B&N cart for like a year now.
If you can find an Octovo Solis, the warm light quality is about the same. Kobo has what looks like a Solis for $19US. It fit my Nook Classic and my Nook ST, plus the Sony T1 and T2.
Kobo light