Horseradish Tree (Moringa oleifera) Seeds

Why Richters does not have Horseradish Tree, Moringa oleifera? A very nutritious plant which I want to eat and have. Would you know any person having the seeds? Richters should try geting the seeds.

We did carry them for a few years but we consistently had problems with germination. Our source was in India and only a few occasions did the seeds arrive viable, and they didn't remain viable for long. We finally gave up.
If we could locate a supplier who grows the seeds and is not just a seed dealer, then we would consider trying again.