Several places have them online in regular and in colors. At Petedge, look under Apparel and Accessories | Pet Jewelry & Hair Accessories | Grooming Bands. They have different sizes too.
Ponki - try the (people) hair section at Walmart, Target, Walgreens, CVS... any of those stores will have packets of clear or black elastics that won't pinchI'm looking for loose rubberbands for tying hair into a topknot. All the places I've looked at only sell the rubberbands attached to the ribbon.
Do you use a special kind of rubberband to tie hair for showdogs? (so it doesn't pull out or break the hair when you try to take it out?)
I get from them too and have been very pleased with the products, both bands and wraps.