I Specialize in high-end. I have experience with high-end speakers, such as Alon (see photos); mid-range such as Snell (see photos); and mass-market, such as Acoustic Research (see photos). I center voice coils electrically with a frequency generator, and never use destructive mechanical centering methods. I stock most common sizes of speaker foam surrounds and can custom order others.
I also repair and replace solid rubber surrounds. I usually repair high-end solid surrounds, since some, like Vandersteen, use a specialized rubber no longer available.
I also diagnose and repair crossovers.
I do not repair voice coils.
Refoaming pricing is by driver size:
Under 6" is $50/driver
6-10" is $55/driver
10.5" and larger is $60/driver