[Amps] Meter bulb in Ameritron amp?

[sentek at sprintmail.com (Floyd Sense)]

Can anyone recommend a replacement bulb for the meters in an Ameritron amp?
They're 12 V bulbs of the grain-of-wheat variety.  I have some bulbs I
bought at Radio Shack some time back and they're the exact same size, the
but RS bulbs glow very dim at 12 V.  The original bulbs measure 30 ohms, the
RS bulbs around 128 ohms.

K8AC