Hi from the States

Researching for a little project and all my searches haven’t produced limited results

I am looking for info on Ford roller lifters
Need for speed lists some from Piper cams but does not say they are roller followers

Looking for PICs and specs of these lifters or any info I can get like yes there are such things as these small Ford Roller lifters

Do they come in Hyd and Mech versions?

Thanks in advance
Davegt27