It is possible? Absolutely. You'll need to bore out the saber first. Considering your dimensions, it would be tricky to make it compatible with some of the parts here in the store.

Another possibility would be to keep your original saber as-is, and build a new one with the intent of adding electronics. You should be able to make a very close approximation of your saber with MHS parts. Check the builder: http://forums.thecustomsabershop.com...mhsbuilder.php and see what you can come up with.

There are a fair number of smiths with their own lathes that make their own sabers from scratch, and put electronics in them. You just need to design the saber with the internals in mind.