I feel your pain. Maybe it is just the supply chain, but I think I would become a hoarder. People can take all the toilet paper they want, but I would fight for the last MH bulbs. Those DE bulbs are nice and the selection of MH bulbs is certainly not growing.
I use Radium 400 watt SE and they are still around along with Hamilton, Ushio and others but I always hold my breath when I get ready to order replacements. My old favorite XM bulbs are long gone.
If I recall correctly, I think Adam at Battlecorals liked Iwasakis and they got phased out a while back.
Good luck.
