Rome Complete Box Set

I'm brand new to this site, so please bare with my apparent lack of knowledge or decorum...

I really like your design for the Rome Complete Box Set blu-ray cover, but I cannot find a vendor for a Vortex or Viva Elite 10 disc blu-ray case in the US. Do you have a variant for this design that would account for a 5 disc case? Or would the difference in spine width (21.8mm on a 5 disc vs 25mm on a 10 disc) be negligible and could be remedied by simply trimming off a little bit more from the edges of the front and back covers?