For larger hammocks that may not be gorgeous but certainly work, try the
baby "jump suits" with a zipper in the front.  You can take the zipper out
if you like.  Use shower curtain hangers at the wrists and feet to attach it
to your cage.  Cost of shower curtain hangers - between 99 cents to $1.59
per package of 12; cost of baby "jump suit" is about 50 cents each at your
local thrift shop or church rummage sale.  They are snuggly, easy to wash,
most ferrets seem to love them and they cost less than the $20 plus for a
hammock at the local pet store.
 
SG
[Posted in FML issue 2400]