Where Can I Find a Butterfly Net?

Any ideas where we can buy a butterfly net? Getting lots of hummers in our skylight and cupola lately (2 today). We've been waiting them out until they're exhausted and will come down to drink, or just fall on the floor... then try to get them outside before the cat sees them. That's been working, but sure is time-consuming. Would like to have a fine net to catch them for release with less waiting and chance they will hurt themselves.

Heather

We sometimes put our spider broom up into the cupola and the hummer lands on it. Then we slowly move them outside on it. We have also used our pool net.

Tried the duster... it just seems to frighten them further away. No pool or pool net. But thanks for the thoughts!

Heather