Great to hear from you!!! You have such visual articulation when you describe where you are... lovely.
I'm glad that she liked the telegram...small things put together with thoughts, always have a greater impact than something large and expensive.
So...you're coming over here...let's see what we can come up with.
How about sending her a sweet Hallmark card, one that when she opens it up, it plays a song relevant to the theme of the card? You can also go to a Hallmark Gold Crown card shop and buy one; plus you can go online and order one. Something sweet, not too mushy, etc.
If she collects anything, small, pick one up. Maybe, if you have time, find a new bulb for her garden next spring. Don't go overboard - nothing pricey, just small and thoughtful.
Will she be home, while you are away? If so, then "plant" a sweet card in her lingerie drawer. Or make a great thing in your kitchen, then put it in the freezer for her to find; like the chocolate mint ice cream.
Also, if there is something that you can't find in your country, that she likes, it might be over here, so pick it up. Remember, the key is to make it something small but with thought.......
Good luck...have a safe flight...let me know how things are progressing...