I know knitpicks.com has a pattern for a tie... and i think it's free!
I like the pattern on the belt- what are you using to keep it there? or are you just tying it? I'm trying to figure out a way to secure an extra-wide "waist" belt, but I'm coming up short. I'm wanting it to look like a miniature corset, but every belt closure I've seen cinches a bit.
Anywho, great job- you've got nimble knitting fingers!