SampleTank 2.5.4 is working via LinVst,
so probably can expect the same for SampleMoog,
SampleTron, Sonik Synth, and the other IK derivatives
and 3rd party expansion soundsets. I copied
all such sounds into the SampleTank Instruments folder,
where all can be used from the same gui.
www.esoundz.com sells many of these, often
at nice discounts.
For the Zampler plugin, I got the free Waldorf Drums
collection, it has 10 kits, each with
13 synth-electronic-drum sounds. Lots of fun,
and good fodder for making some Hydrogen kits.
Cheers