This will be interesting to see.
I have been putting raw nickel/silver metal covers on my SE's that have zebra pickups. I'm not particularly fond of the zebra's either. These raw nickel/silver ones look like the covers on a Seymour Duncan Antiquity humbucker. I dig the unpolished, dull look, rather than the glaring, unsightly chrome ones. Polished nickel is nice too. I have plenty of guitars with highly polished, gleaming chrome too - just joking about the "unsightly" glaring chrome.
Keep us posted on your pickup cover project. I hope it works out. The size of the covers are 50mm and 52mm, in case you need to know. This way the holes will line up with the screws really well. I did not have to remove the pickup pole piece screws; the covers just fit straight over them and fit nice and snuggly. I left them wired to the guitar and put down a towel and soldered just one long side while I held the pickup assembly together firmly. This works very well and there is no need to solder both sides of the metal case. I sanded the site where the solder joint would be formed and used "paste flux" to eliminate the problem of the "electrical lead containing solder" from balling up and rolling off. You can get very good quality "lead" containing electrical solder in rolls of 1mm diameter from Radio Shack. It works very well and melts with the use of a 15 watt pencil type soldering iron. "Lead free" solder is very difficult to work with and is very difficult to melt with a soldering iron. Maybe you can find some lead free electrical solder that melts easily with a soldering iron. Let me know if you find some and where you got it. Do not use "plumbing" solder, use electrical solder only.
You probably already know all these things. Do what you think is best and use the materials, of course, of your choice that you think are best for you. This is just the way I go about it and it may be of interest to someone not familiar with soldering, but is not advise. Check into the requirements and advisories for soldering in your area and make your own decisions as to what to use.
Good luck with your project.