Keep an eye on Pacific Rim Camera too.....

I eventually found some Zeiss Icon 6.5 x 9 holders with sheaths from them.
They sell on eBay as well.
Holders from other makers may work as well. I found an ARCAP Combination Holder that worked on my camera, its sheaths are interchangable for different sized film, unfortunately it only came with one sheath.

Make sure the holders you find come with film sheaths.