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It likely won't be a "wire" that'll do it, or at least nothing pre-made. You could use something like a TBC that has component input and S-Video out. A relatively abundant one would be the AJA FS1. PVR output should be plenty stable enough for the FS1 not to drop frames. If you want something cheaper and you don't mind doing some experimenting, you could try to strip chroma from the composite and then just use the Y signal (green wire) from component as luma. Separating the chroma signal from composite would involve passing the composite signal through a capacitor and likely an inductor as capacitors tend to block DC and pass AC. For this to possibly work, it assumes that the component output is synced up to the composite output which may possibly not be the case, so could be that doesn't work. It also will not work if the component outputs are progressive instead of interlaced. If you want to do a quick check if that is the case, connect the green wire from component to a composite input and you should see a black and white image displayed on a regular standard definition CRT without any issues. Should also be seen as a valid composite signal by the DVD recorder also. Depending on the DVD recorder's internal YC separation, you may not notice a whole lot of difference to make that worth actually doing.
A better solution would probably be finding a device that will just record the component signal as that is better than S-Video anyhow. If the PVR outputs component progressive, the cloner alliance box pro would probably be a good choice as a recording device since it won't have to deal with deinterlacing and has native component input with a higher bitrate than DVD. Fancier options would be some of the Blackmagic hyper deck studio line, but those tend to record to either SD cards or SSDs usually as ProRes. The AJA KiPro can also record component directly, but you'll be left with ProRes files that are rather large, but certainly higher quality than DVD. Your limiting factor here is how good the quality is out of the PVR though.
The other thing you could look at are devices that will accept component and then output as S-Video as a sort of electrical to electrical (EE) mode and are essentially passthrough devices at that point. If you happen to find an inexpensive Betacam deck locally, it'll likely be able to do that, but that's a pretty bulky item for that purpose.
Lastly, you could use SDI as an intermediate and use something like a Blackmagic analog to SDI converter paired with an SDI to analog converter. The analog output side will let you choose if you want S-Video output and the analog input side can be set to take component input. Might add some lag though, not sure if it'd be enough to notice. These use BNC connectors, so you'd need to get an S-Video to BNC adapter as well as some BNC to RCA connectors for the component side.
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