Jack's Giant Trip

Jack has been invited to go to Austria, Germany, and Switzerland!!!!! He was chosen out of 1300 students based on his character and academics. I couldn't be prouder!!! Here's the problem... Jack's sister is deaf and has a cochlear implant that is outdated and needs to be replaced.The cost of his trip (approximately $4,500) and the cost of her new implant ($7,000-$8,000) is just too much for this little family to come up with alone! When I told him about needing to replace the implant he immediately replied, "Mom, Zoe needs to hear more than I need to travel." What a kindhearted young man.
So here we are asking for help... Please send Jack on this once in a lifetime trip!