If you want something in between, I modify the standard pressed steel ones with my own .044" offset bushes.
This gives a ratio (tested with an RE13 cam) of 1.31:1.
Standard pressed steel rocker measured 1.21:1,
sintered rockers 1.18:1,
S forged rockers 1.16:1, with the same cam.
If the pressed steel rockers are the 1275 variety (oval pads) they give 1.35:1 when offset bushed. I did a set recently for Simon K.
The rockers are bored to clean up, the bushes are pressed into the rockers, then offset bored to size in the mill. This ensures they are all the same geometry.
The rocker pillars are bored and bushed to move the shaft back 1.6mm.
Shaft is a HD thick wall.
PM me if interested.
<edit> I can also do Corolla ones, they give 1.46:1 ratio tested as above. On these, the rocker pillar shaft holes are plugged and welded, then the holes bored 4.0mm back.
