The factory they get them from had some sort of fire/explosion (no one was hurt). Right now they are waiting on samples from a new supplier. If they are acceptable they hope to fill waiting orders in 4 weeks or so.
The only reason I know this is because I have an order in for one and contacted customer service with a question about my order.
Hope this helps.
Gassamer Gear has an 1/8 foam pad that is very popular with the backpacking light crowd. They do not have it in stock but show it due in Sept/Oct. It might be worth a phone call or email to them.
I wanted one as well, settled for a 1/4" 72x20 pad I found at Academy for $13. Trimmed it a bit to match my Ether Light XT shape and got it to 7.65 oz. Not UL, but it'll do the job intended. Just bulky.