Hello,
I am a national park ranger at Mammoth Cave, in Kentucky, USA, and am in need of any parts/bits of Premier carbide cap lamps (or other brands), or even entire lamps, working or not. I especially need burner tips/jets, and also really need tip brushes/tip cleaners/wire reamers. I would love for people to check their old stuff and see if you still have any, and ask any "old timers" if they have any they would be willing to part with. I will gladly pay all shipping and for your time and trouble to post them. Thank you.
-LJ

Caving Supplies in Buxton, UK were the last manufacturers of Premier lamps. They were still selling spares a few years ago but I don't know the current situation. Their website is https://www.caving-supplies.co.uk/

Please ask my acquaintance Ruppert H?ll in Clausthal-Zellerfeld/Germany.
He could help you for sure.
I know he bought some of the old Premiere manufacturing tools (for the reflectors etc.).
Also has burner tips etc. on stock.

His company homepage with contacts.
http://www.bergbautradition.de/