Without the technical specifications, it is not clear if both Tokyo and Anaheim systems use the same IR base frequency. On top of the frequency type there is also all the encoded message/command signals that are used to tell the ears/wand to change color, turn off/on, blink, etc.
For DLR and TDS, the ears/wands are like your TV/DVD/Blu-ray devices. They "receive" and interpret the signals being sent out for the shows. One can not "change the signal", but have to be able to receive and properly interpret the transmitted signal. Disney acts as the "remote control" and transmits the signals to control the ears/wands.
Any of you familiar with TV/DVD/Blu-ray remote controls understands that each device has their own remote that is used to control it. If you do happen to have the same manufacturer for two or more of you devices, it is possible to share one remote to command most basic functions. However, if they are from different manufacturers you need to either program the remote to control a second device (IF that feature is available) or purchase a universal remote control and program it for your particular device.
Bottom line, it would take some serious reverse engineering to figure out all the signal frequencies, codes, etc. used by both DLR and TDR to have one device that would work at both locations.