Tejo, I would try the Radio Shack website. www.radioshack.com, click on tv/audio.video not wire and cable. Under audio you'll find part no. 42-2602, 3 ft cables. Under antennas & video, then cabling if you search, you'll find some a/v cables that are thicker and have the rcs plugs attached more securely. Better shielding. Part no. 15-1504 is a mono and video that is actually the cable used by some of the early proponents of RS cables. Not available anymore on-line and may be hard to find in a Tandy store, but I think they're fine in comparison to a lot of budget interconnects by big name cable companies.
You should be aware though, the people who recommend Radio Shack cables generally do not believe there any differences between interconnects at all.
Trej, I dont think there are any Radio Shacks in Lisbon. Any Tandy stores?
