I think that might work for the purge solenoid valve but the CDCV valve is different. Our CDCV might be specific to the P5. Even the four door protege has a different part.
It's on page:01-16-7 of the service manual ours is 2 pages later.
I just phoned my local dealer and gave him the part #FS8L-18-741 and it came up as the CDCV and is the correct part and # (I don't think it's different in the US). This time I was quoted $252.87, the guy must have looked up the wrong part the first time I called them. He said it's a very specific part for our cars only. I wonder if there still might be a solenoid from another car that would work though. It has a very simple operation of only open or closed and if the hoses fit on the fittings of a different cheaper part from another car I'm sure you could wire it up to your car. If you find something at a junker, make sure you include a good length of wire and the entire connector to splice into your wiring. I kinda think the regular CDCV would work from any protege and there is a lot more of them out there. The only other issue might be the mounting bolts but you could easily zip tie it or something like that. One other issue might be whether the solenoid is held open or held closed when the power is applied. Make sure they operate the same way. I'd start with taking off the one you have and see if you can do something like the EGR cleaning we all have to do, but it's way easier and you don't have to reinstall it. It's basically not doing anything anyway, maybe just plug the two hoses to keep crap out while you try to clean it and compare it to other valves off other cars.
I just checked the service manual and it is the exact same testing procedure for all protege's but they show the CDCV off of the regular protege, the only difference is the mounting bracket. I'm almost positive this will work for you even the wiring and connector you just have to find a way to mount it.
I just looked under my car and it looks super easy to work on,.. no need to lift the car either. You may very well be able to install the regular protege' valve and not even mount it. The hoses are pretty hefty and could probably support it without extra help. Or you could use a piece of coat hanger and wrap it around one or both of the bolts in the frame then wrap it around the solenoid with zip ties or electrical tape.
Good luck with your Jerry-Rigged solenoid it might save you $252 plus tax and labor. (minus the cost at the wrecker of course)