Hold on. Most computers since like 1998 already have a firewire port. What the technician wants you to buy is a card for computers without firewire.
You would do well to check whether you have a firewire port. If you do, you wouldn't need a card. What make and model is your computer? Is it a laptop or a desktop? If given the make and model, we may be able to look up the documentation and see whether it has firewire and where the connector is. And like I said before check whether it uses a 4-pin connection, or a 6-pin one. Then you can decide what cable to buy.
I'm looking closely at the diagram on page 47 and it appears the connector on the camcorder is a 4-pin one. I'm still a bit puzzled whether a dv cable is the same as a firewire cable. If it is, you're probably safe to buy a 4-pin to 4-pin, or a 6-pin to 6-pin standard firewire cable.
http://www.newegg.com/Product/Produc...+cable&x=0&y=0
(skip first 2 or 3 matches. the rest is 4-to-4 or 4-to-6, with a lot of different available lengths)
If you're in doubt, call the technician again and ask them specifically whether a DV cable is the same as a firewire cable (hopefully the person who answers knows for sure). (some companies have weird names for firewire (that's Apple's name). the standard is IEEE 1394; it's called i.link by sony, and lynx by texas instruments)