Ticking noise from engine?

Removed driver side. Found one collapsed. Can you help me with the part number?
It's on the front mds section.
It's the 3rd one in the picture in order from front to back.
I assume other than the difference between the two types for being mds with a hole and non mds, nothing else is different and the rear ones are same as front?

I am just going to change the one lifter and see, don't want to fool with cam.