Well, if you can't find a bigger one - rest assured that your Bailey will find a way to play with the smaller one. I'm sure he is still 'fine boned' like most yorkies and they will play together fine.
My Westie is much more muscular than my yorkie or than most toy breeds and HE has figured out (mostly) how to play with Lucy without hurting her. Westies also have very strong jaws and he hasn't hurt her.
Anyway, it IS different having a very small dog. She can't get up on things (something my Westie greatly appreciates) or jump and off of things like he can. She doesn't like the outdoors or walks as much as he does.
Somtimes . . . that's a good thing!
Anyway, I hope you find your bigger yorkie. But if you don't . . . you can make a smaller one work too.