WOW! Got any brothers ?
Most riders are very particular about their saddles. It is the most generous idea, BUT a saddle is a very personal item. You may be just as loved by giving a handmade gift card saying that she gets to have/pick the sadlle of her dreams. Or, don't know if you or friends ride try something like "Joe said he /she was going to buy a new saddle it cost $2,000 if you were going to do that and money was no issue what would you buy". Good Luck