When my gearbox went back to Eurocopter, shipping the gearbox (or sections thereof) requires blanking plates and transport crate. I found these to be very expensive. And they were not available for rent - I was supposed to buy them. I searched around and found someone who would sell theirs to me, then when the job was completed I sold the things on again for the same price and got my money back.
You could look to do the same thing and save a few 000's.
Best of luck