Vaughan, nope I ordered them thrua member on the Montana Forum. He had supplied a lot of the Montana owner and they were all happy with them. Not the cheapest around, but having worked in the Electronics Industry all my life they were very well constructed. Here's his Web site:
http://www.filamentfree.com/
They don't stock them, but they take orders and when they have enough they place the order with the manufacturer (it is off shore, but as I said, very good quality).
The only problem we had was with some of the replacement for the ceiling lites, as the leads on the LEDs are a little smaller and some of the lite fixture sockets are a little loose. So I had to put a little bend in the new leads to keep them tight into the fixtures (only had a couple that were a problem). There are a lot of satisfied Montana owners.