@JimP. I'm sure someone will respond that this works great and tell you exactly how to do it. If it works, it works.
But, I'm just not sure why you would do it when it is really cheap to buy a ski. You can currently buy a Radar TRA in 63 or 65 on wakehouse.com for $199. Williams Ski and Sport has them for $219.
Even if your child used the ski for two or three years (mine used her TRA three if I recall), and even if she beats up the aki (girls don't typically beat up their gear), you will still be able to sell the TRA for over $100.
While I have no idea what is your financial status. However, I'm guessing that if you are riding Goode skis, and participating in this sport, you are probably doing ok. Given that, I would not think it is worth your time to cut the ski, buy the materials to patch the carbon fiber on the tail, your time to repari the the tail, your time to properly place the bindings, tail, etc. I would think your time and materials are worth WAY more than the $100 or so you might lose if you just buy a TRA.
My $.02. Maybe I am wrong.