Something tells me you are not from around here HI HI.
Anyhows Quintrix in the states was about 1980 & IIRC
used the Zenith EFL CRT. They came 13", 19" & 25" US size.
They were the better sets in the line.
Find the remotes OEM part number & do an open search on E-Bay.
The format is 3 letters followed by four numbers & sometimes a
dash & one more number. May take a bit but universals seldom
cover all the functions.
good luck
Zeno
LFOD !