/vr/ - Retro Games

two questions now, one when I can remember what it was, and a photo of a shitty Toshiba something or other, taken with a shitty phone camera.
>1.
Where should I look for PVM's? I've had an ad on Craigslist and some Facebook groups for months now with no results.
>2.
I'm going to make my own A/V switchbox. I'm currently using a 4-way from best buy, and an 8-way from amazon, along with a A-B box for RF that's probably older than I am. I'm going to cannibalize everything but the A-B box, and add in S-video and possibly component support for when I get around to modding my consoles. Any tips, like cheap/easy ways to shield everything? I've got a roll of aluminum tape I was planning to use, but I don't know if that'll give me the result I'm looking for.