I haven't heard anything specific, but it does seem that the Elite 4200 1.5x-6x are hard to find. Unfortunately, the Elite 4200s don't come in the next magnification level of 2x-7x. Instead, they jump up to 2.5x-10x. I know that you can get an Elite 3200 in 1.5x-4x, but the glass in the 3200 (while good), is not as good as the glass in the 4200s.
You should take a look at the Nikon Monarchs. I know for sure that they come in a 2x-7x, and maybe even a smaller magnification like you want. IMHO, the Nikon Monarch glass is probably better than the Elite 4200 glass.
Zachary