Those forum members who own Panasonic's PV-HD1000 DVHS VCR know how loosely the supplied Firewire cables fit into the receptacles. It's real easy for them to fall out or slip out of contact.
I called Bi-Tronics (1-800-666-0996) in Hawthorne, NY and ordered two of their 10' Firewire cables (part # YD-FW4410). They sell for $19.30 each, and absolutely, positively snap securely into the Panasonic set-top box and DVCR.
No more cables slipping out. These cables do not come with chokes, BTW. (Not that you'll really need the chokes.) Bi-Tronics also has a web site at www.bi-tronics.com, and you can order cables in 6', 10', and 15' lengths.