
Need a couple of 1/8 NPT weld on bung things.
any suggestion
there's these, but only in aluminium... but if you're after aluminium ones, then they are perfect! 
Needing Steel ones - I would settle for a different thread and a converter.
Why not buy an 1/8NPT tap and a bit of round bar, then ; hacksaw, drill, in vice and tap. Simples.