What do you do when you loose a hand knit sock?

The problem of loosing a sock is bad enough, but it's especially tragic when it's a Hand Knit Sock.
It's not like you can just match up the loner with some other sock in the basket. 
And after all, Both Socks DID get finished!  It's not like it's suffering from Single/Second Sock Syndrome.
If you knit another one just like it, will it be the same?
Who keeps enough sock yarn around to knit a whole matching Third Sock?
I suffer from "must use all the yarn available" and usually end up with longer than necessary socks because I can't stop knitting until all the yarn is used.  That's why I only do Toe-Ups and Two At A Time.  Am I going to have to start doing Three At A Time? 
When I do baby socks and booties, I always knit 4 or 6 of them alike.  But, until now, I had never considered making multiples of grownup socks.
HMMMM......