I don't know how many still use ResMed's Mirage Active LT's CPAP mask, but I have learned from ResMed it's been discontinued.
Their response to my query was:
QUOTE
The ResMed Mirage Activa LT mask is no longer available from our stores and online shop. We only offer the latest ResMed masks at the moment like the AirFit F20 and the ResMed Quattro mask.
UNQUOTE
I have tried many other masks, including those mentioned ones, but this one is the only one that has worked consistently for me.
Not only is it an expensive exercise to try new masks, but when they don't handle pressure or leak (as has been my experience,) then they become a real issue.
I would not be surprised if others have had similar experiences.
I have registered my protest with ResMed and asked them to reconsider.
If anyone else feels they have not found an viable alternative, I'd strongly recommend doing the same on their website.
Thank you.