GE 2.4 GHz Digital Cordless Multihandset phone model #21095GE2A?

The phone was purchased 11-2005 warranty has expired. Service operator said the handset has defected and cannot be operable. The box states accessory handsets can be purchased. I called to order and they said none can be ordered. But the GE booklet states Extra Handsets are used with models 21025 and 21095 ( my model phone). Please help