Opposite M/B mounted cases

Uther39

Distinguished
This is just a general question, i am wanting to purchase a case, which mounts the motherboard on the left side of the case rather than the right, so as to have a side panel window on the right side of the case, much like the Silverstone Fortress FT02B-W and Raven series cases, however all though these are very nice i was looking for something for no more than £150 - $200, anybody have any ideas?