Curtis:
Lovely blade ! By all means have a shira saya made for it,but try to save the original mounts and saya. Keep in mind a sword during its lifetime
can be and often was remounted many times . In my opinion as long as you can salvage tsuba ,fuchi ,kashira and whatever other parts then do so.
There is nothing nicer than having a freshly polished blade in shira saya and a functional set of mounts as well.
Respects
Nathan Young