I bought all mine from
Home - Filament Free LEDs (through my brother a Montana owner). google it and you'll find them.
They make superb LEDs I have had zero issues with their stuff.
No radio TV interference and very nice color light and brightness.
Take a look.
It seems the guy has a Montana 5er so he sells to people on the Montana forum, cheaper. If you know anyone with a Montana and is on that forum he gives a 20% discount to Montana forum members.