uhf/vhf mixer for antenna input to tv

[crossd]

..don't know where else to ask this..i'm sure someone here can guide me.

i am still using an old tv antenna with 300 ohm twin wire inputs..works fine..
on my old 1979 Sony..still works!!!..
got a 2001 Sony with only ONE input (coax type)..manual says from antenna must use an EAC-66 uhf/vhf mixer (this is Sony's part #) or equivalent then plug this into tv input..

Problem: no one makes these mixers it seems or at least i can't find anything on the internet..does anyone know how to solve this problem?