Ohmygod, do I ever miss the Carneros Alembic (it was actually owned by Remy Martin!) AND I miss their Pear Brandy...
Searching for years for a replacement, my current favorite -- which I think is better than the RMS Pear -- is a delightful concoction by CaddellWilliams (owners of Germain-Robin), called Liqueur de Poete. You can read about it here; scroll down a bit: http://www.caddellwilliams.com/catDet...
Also, J Winery makes one that is a tad sweeter than what RMS used to do, but probably more similar than my Germain-Robin suggestion: http://www.jwine.com/pear
Don't know exactly what sort of style Carneros Alambic made, but the folks behind Hangar One vodka also produce an array of other interesting spirits (including the infamous absinthe that the maker, Lance Winters, discusses so thoroughly in the Obsessives section of this very site). Among them are pear and raspberry eaux de vie - might give em a try.
Eau de Vie is like a grappa; mostly flavorless and colorless with the essence of the grape and/or fruit from which it is made. The RMS brand was a sweeter, more unctuous concoction.
I like the St. George products -- especially their Muscat Grappa -- but it is a different animal from what the OP is looking for.