I read that LI does have molds that use Queen size; but yet all the retailers say has a seam if not a twin size.  So why are the retailers not selling them?  Only Rocky Mountain Mattress has no seams, but it only goes up to 32ILD, I need more firm.

Sleeplikeabear says on their faq page they charge more for no seams.  Anyone know?

I would call SleepEZ and ask them point blank if they can send you one without a seam; them and others; just call and ask.