Just to bump this a little, as a small scale user... Having had real issues with stock availability and product reliability from Le Maitre over the past few years, I can thoroughly recommend the lovely people at Illusion Pyrotechnics. They've been able to supply alternatives to any of the 'regular' products we've required recently, and have always 'thrown in' the adaptors to suit LM firing gear. We had a 100% successful fire rate since using Illusion. Not something we've had for years with Le Maitre.
It's great that there is a meaningful alternative coming onto the market. 🙂