While there is currently no way to make RBDM by means of reactions, the upcoming element BASE will have a 1/35 chance of mixing with neutrons to make LRBD which can then be cooled to make RBDM.
damn, good to know, gonna be pretty interesting what you could do with that thing.
Just so you know BASE acts like ACID and rusts conductive materials (including gold)
BASE only corrodes when it's life is greater than twice an element's hardness; BASE also doesn't rust BMTL or BRMT and only rusts any metals at all when it's life is 10+.