I have not seen a straight converter but I have seen many VCR's that can input one and output the other, the one that happens to be next to me is made by samsung, model # sv-4000v.
Hope that helps.
We recently purchased a Panasonic plasma tv (TH-42PD25U/P). We've now learned that we'll be moving to Europe within a year. We'd love to take the tv with us but so far I'm not having any luck finding an NTSC/PAL converter that will work with plasma. Is there such a thing or are we going to have to sell our tv here?