Amazon.com: Small Size Magnetic Loop Antenna, Antennas, for Indoor Outdoor : Electronics
Amazon.com: GA450 Loop Antenna, GOOZEEZOO Active Shortwave Radio with BNC Cable SW 2.3-30MHz MW 522-1710KHz Portable Receiving Antenna for Ham Radio : Electronics
Used LA400 AOR AMPLIFIED INDOOR MAGNETIC LOOP ANTENNA | eBay
10-80M HF/VHF/UHF MagLoop Magnetic Loop Antenna
New indoor passive loop antenna for shortwave | The SWLing Post
MLA Magnetic Loop Antenna | BTV
Performance comparison of a Magnetic Loop Antenna in a Basement, Indoors, versus Outdoors
Mag Loop Antennas | The SWLing Post
A few QRP homebrew projects
AA5TB - Small Loop Antennas
A Magnetic Loop Antenna for Shortwave Listening (SWL) - KR1ST