Well they make the Asylum in 134 x 41 which is a great board.
I'm pretty sure they'll add a 134 if there is demand although in the UK last year everyone wanted 138 and 141 Asylums !!!
What width would you like a 134 to be?
I have found that the width of a board is far more important than the lenghth. I know 42cm is the right width for me with straps @90kg
Asylum 134 is a killer fantastic board, it is so super that I don't want to imagine how not existing 134 Vision would feel like, and even if it existed I'd might got crazy it got better.