I am looking to find the famous strip weher Linus comes across スヌーピー freezing, and コメント "Be of good cheer, Snoopy" (or something like that. Can anybody help?

I don't know where あなた can find that exact comic, but if あなた know what 年 it was in, it will be easy to find on Comics.com
Even if あなた don't know the year, あなた can still 検索 for it. Here's the link: link The website reposts all the old comics, one per day. There's a 検索 bar where あなた can put in the year, 日 and 月 to look for the comic. Good luck, I hope this helps.