i tried amazon but they were used o_o links would help
Trade Secret and they are everywhere or Toronto Barber & Beauty Supply 100 Dundas St W ( Main intersection Bay Street ) Toronto, ON M5G 1C3 (416) 977-2020. I do shops in this location a lot. Or if you want you can take the TTC train and get off on Wellesley Subway then walk south to College Street ( Yonge Street / Wellesley and all the way to Yonge and College there are small stores next to each other that you can find a new large velcro rollers. Or in Chinatown Public Warehouse only for hair, shampoo, rollers, beauty supplies right on Spadina Road / College Street then, walk south all the way to Dundas Street West. If you are going to New York, Manhattan there's a place there right at the China Town you can also find it there too. Or else check on website ...
I went to this store yesterday night at Cosmetic World at 623 Yonge Street they have great large velcro rollers.
Ebay, Walmart, Amazon, Velcrorollers.net, Hairsupermarket.com Hope this helped!(:
Amazon or Walmart would have them online