I need to find a source online where I can purchase foam earpiece
covers for an in-the-ear cellphone handsfree earpiece.

Mine came with a foam earpiece cover but I lost it. I stole one from
my wife's earpiece (she doesn't use it) but then that one wore away
from use.

I'd like to find a place where I can buy these - preferably in a
quantity of 10+. I can't imagine they cost more than a few bucks -
definitely better than buying a new $29.95 earpiece. I just can't find
anywhere online that has online ordering, where I can purchase such an
item.

Hello crhptic,

Thanks for your question.

I searched for ear bud foam replacement and found numerous hits.
Though these come in various sizes and shapes, I think the following
site will be a safe bet for you.

http://www.globalsemi.com/cat99/audioaccess150.html

Here you have the following options:

Replacement Ear Bud Pads 

–Fits Most Ear Bud Headphones.
–Assorted Colours.
–Display Packaged
 
Our Price: $ 1.60(3 Pairs) Order #: 100-13  
 
Replacment Mini Stereo Pads 
–Fits Most Stereo Headphones.
–Assorted Colours.
–Display Packaged
 
Our Price: $ 1.71(3 Pairs) 

Another vendor's page shows a pack of 10 for $8.00 by Motorola:
http://www.mcsradio.com/product.cfm?pID=183

And yet one more for 10 for $5.00
http://www.marilynelectronics.net/products/earphones/earbud-replacement-pads.htm

I think one of these will most likely fit your set.

Best regards,

-=clouseau=-

exactly what i needed