These are so fun to make. I did not follow a pattern because at the time I made this one I had made a few other and was just winging the base. I have some hair ties in my craft box and my sister-in-law lost hers. I really need to make some more.
I Google lens buddy patterns and found there is not any available for free. the one I did find had some weird add an extension to Chrome screen I was not about to click okay too. Good thing this persons YouTube video is still up and you will at least be able to have a stitch count for a base. If I make any more I will write up a pattern.