In this case they sell the hook side and the loop sides separate, make sure you buy at least one set of each if you go with this random website I usually use
Hobby/craft or fabric stores usually have more heavy duty velcro. Also maybe a home hardware/home depot style store.
Amazon, Home Depot, Lowes, Walmart, Target, Harbor Freight are your online/big box/retail chain options. Otherwise, check our your local hardware store or craft store, as others have mentioned.
Isn’t the whole point of Velcro that you can rip it in half?
Guys this thing I bought at the dollar store sucks! What do I do?
Try buying actual Velcro not dollar store garbage.
My dollar store Velcro is only worth a dollar, halp!