Federal Mogul's 119M is a tri-metal bearing w/ their "3/4 groove" design, although it's more like 5/8 if you ask me. It combines a wide groove like the traditional Hemi main bearings, but maintains more bearing surface area where the loads are the highest.

Only comes in the small-thrust style, but works in either small-thrust of large-thrust applications, plus it's narrowed just enough to work w/ full-radius cranks, too. The one limitation IMO is that it's only available as standard and .010" undersize.