Just get the kind that you can order from E-BOGU or whoever imports budo gear in your country. The kind that cover most but not all of the bamboo and end in cords that wrap around the "tsuka."
Thanks Cliff, I went online and purchased a long Fukuro shinai from E-BOGU. They look nice. At least it gives Sensei something to look, feel and train with and let us make a more informed decision at what to buy while in Japan. At the end of the day it's another fine exercise body movement tool that doesn't hurt when you accidentally hit someone.