You might try contacting Mark at Long Haul Folding Kayaks
http://longhaulfoldingkayaks.com/
there is a phone number on the web site .

I don't think he makes anything that large as a standard offering but I
think he does do custom work . It can't hurt to give him a call and find
out if it is doable at price you can accept . His standard bags get good
reports .

David

wrote:

Does anyone know of a giant backpack for my inflatable Sea Eagle
PaddleSki 435 catamaran-kayak?

It has to be 35" tall and 60" in circumference (don't know how that
translates into cubic whatever).

Thanks!!