You'd be surprised; the original crankshaft for my 100/6 engine came back from the machinist std/std after just being polished. They're pretty tough. Although it's been AGES since I put the 3000 engine together that's currently in my car (since 1986) I believe that one came back std/.010.
I don't do batches of bearings as often as I used to, but I DO have some polymer-coated bearings already on hand. These were for personal stock, so if you're interested, once you know what size bearings you'll need, buy them from Richard (aka BoyrRacer) and if I have them, we can do an exchange + cost for the DFL (dry-film lubricant) coating.
Some examples...
Mostly Big Healey, including thrusts, and a single set of BMW S54 rod bearings (right above the "BU" & "RD" @ bottom-center)
Rod bearing comparison: BMW 3.2 Ltr/315hp @ 8000 rpm vs Austin 3.0/117hp @ 4800 rpm (IIRC?). Parasitic drag, much?
Pistons too!