I don't have any spares for these drives. As I
said earlier you need
to know the complete model number to get the right drive to take parts
from. It does have to be a -B (double head, 48tpi). The -A is
single-head, the -E (very rare!) and -F are the single and double head
96tpi versions, so the head is designed for a narrower track.
What is so special/rare about the E? I have only seen the -B and -F variants used in most
machines.
-Ali