I've had the same problem too. It's really weird, I have been doing Mana Golem and Supplies to Spin for a very long time. I have reached the maximum amount for Dark Crystal Shards, Tainted Gems, and Gems of Nulgath. I also have enough Diamonds of Nulgath to complete Juggernaut 2 times. I JUST DON'T HAVE A FREAKING NON-MEM VOUCHER OF NULGATH.
@JamesRo, is the drop rate really low or is Le Bot not picking it up? Thanks.