Aluminum replacement for my leaking carrier evap

I'm told that I have a leak on one of the inner coils of my Carrier FY4ANB060 evaporator. We are only going to live in this house for at the most another 2 years so I would like to go cheap if I can. Is there an aluminum replacement that could be used instead of the copper/ tin unit that needs to be replaced? And if I must replace with another copper/tin can my installer even get one? He left today and said that he would get back with me on what he can find. He shared the model and serial # with me but all I can find is a complete air handler.
Thanks