[Source] Bulk silver square charms

Hello,

I am looking for a source that sells wholesale sterling silver
square charms to use for inserting photos in. Can anyone direct me to
such source - I want to buy in bulk.

Or any other suggestions - such as knowing someone who creates such
products.

Example found on the following link:

http://www.ganoksin.com/silver-square-charm-large.jpg

Size is 0.5 x 0.5 inches and it weighs approximately 3.5 grams.

Many thanks, Monica