I have 8 of the AB-577 mast clamps and one of the middle guy plates available (all used items in good condition). $35.00 plus shipping from 89429 for all. That's about half what the commercial sellers ask for these items. -- Jack, W6NF Silver Springs, NV DM09ji Migrating my e-mail to vhfplus at gmail.com. Please update you address book. Thanks!