Freddy3rd,
As far as I can tell, there are still Grand Auditorium, Grand Symphony, Grand Orchestra, and Jumbo versions popping up on the used market. I have a 355 Jumbo I got new 20+ years ago, and a more recent 458e-R (rosewood) Grand Orchestra I got used a few years ago. Patience and perseverance are your watchwords. In my case I had looked at an 858 and liked it, but really couldn't justify the cost. Then one day the used 458 popped and I got it. My 355 has been in DADGAD interval tuning for a while. I keep both based on D# and use a G7th Newport 12 string capo with the compensated string pad when needed.
Still a fan of large body guitars, but very glad for my short scale 412e-R.
Good luck and good hunting,
Don