I have a '95 1.9 ltr Wagon.
Cylinder # 3 has a broken retainer which is supposed to hold the lifter in place.
Can anyone help me as to where I can purchase this item??

Try www.rockauto.com, or autozone.com, or advance-auto.com.
I think you probably mean valve spring retainer?
How did you know it needed replacement? I'm troubleshooting a tapping noise on my 95 1.9LX.
Good luck.