Quick update in case anyone else needs to know the answer.

You can get the 90 and 110 zero flat stems from the Felt International website. The cost.... wait for it.... 149 euros for a small block of what I assume is machined aluminium! Plus, depending on where you live 65 euros shipping...

That works out to be about $250 USD inc shipping to Australia - aaaggghhh really?!

After waiting more than an month for my LBS/Southcott (Australian distributor) to even give me an answer on availability I'm about ready to give up. I guess my option is to wait until I'm in Redmond next and get the LBS to order me one.

Pretty disappointing.

Success

After 6 weeks, the Australian rep can confirmed they have the new fixed stems coming into stock. No word on pricing yet.