Safety razor cover question.

Right now I have neither the time nor the money to invest in straight razors. So, for a compromise Im gonna try a safety razor. I am looking for a safety razor cover (IE: something that covers the blades of a safety razor). I recently saw on online somewhere but I did not record the site and now its lost forever. I have tried searching for it via google but it comes back with the most utterly useless results known to man.

So my question is: where can I find a cover/cap for a safety razor?

Thanks

buy a new one and they can share :P