Heavy Duty Drywall Anchors and Screws Kit Including Toggle Anchors & Screws #8 X | eBay
1/4-20 Zip Toggle Anchor | Gyford Standoff Systems
Amazon.com: TOGGLER SNAPTOGGLE Drywall Anchor with included bolts for 1/4-20 Fastener size; Holds up to 265 pounds Each in 1/2-in Drywall by TOGGLER (4 Pack) : Industrial & Scientific
CRL Snaptoggle® 1/4" - 20 Toggle Anchor
installation - How do you install the plastic/nylon toggle anchors? - Home Improvement Stack Exchange