Not every thing on this site can be trusted to be a real spell even if it does seem logically to be real and work.
No spell you can find in any book you can buy or on any website you can find with spells written by another person will work as good as any spell that you write your self. If you don't want to write one just Google rune spells.
But if you don't mind creating one, study the runes or multiple runes or even all the runes if you want to and figure out which one(s) will suit the purpose for which you want the spell to work. You can meditate on them as well to help attune your self to all or specific runes. From there just write a spell that states your intent for the spell and include if you want a nice summarized description of how you want the rune to help you or what you want the rune to do. It may take a few tries to write one that's good and works right for you, but in the end the effort and time is all worth it.