I can't imagine a private seamstress doing this cheaper than a co. in the business unless, as in the case mentioned above, she didn't understand what she was getting into. One cure is to get a bigger boat where they use standard mattresses
. Seriously though this has been the bane of every boat owner for years and there is just no way around it. Pick up a few mags & go on line also and compare. Then get out the big credit card and remember:
Bring Out Another Thousand