I heard back from Battle Arms. Apparently they still make the old ones but if you want a set you have to piece it together from their replacement parts section.

Anyway I found some new old stock that should be on the way already.

I would love to switch to the newer design from them or from Radian but as far as I know they don't offer scalloped levers for those selectors.

The 45 degree (ish) ones are really interesting.