Sony NW-A55 input jack replacement needed

Hello

I have a Sony walkman which I have had for years and now the input jack is loose. I contacted sony and they directed me to United Radio in New York who said they could fix. Well they just called me and told me the input jack is no longer available from Sony so they are unable to fix it and they can only obtain parts from Sony but alluded that after market parts do exist and alluded that can be repaired. I have no idea what my step is. I can't find any parts for the walkman online. Not sure if the input jack is proprietary or not. Can any one point me in the right direction? Thank you