Anniversary Cards are hit and miss for any thing other then 25 and 50 I would suggest finding a nice Wedding theme and stitching it in Diamond colors. Add the 60 in place of the other numbers. 123 stitch has some nice patterns.
If you are looking for some one to help change you, look in the mirror
I think it depends on if they like a hobby or if you wanted to do a certain theme,A good place to look is in the cross stitch card shop mag(uk mag)if you can get hold of one.