For what it's worth, I still have an old-school Aladdin 2G dive computer that had gotten working with a generic IR transmitter that looked just like that.
It might still be among the best options out there for basic logging functions (actually just got new batteries and was thinking to get it going again). But, if you check Amazon for pretty much any USB-to-IR like that, you should find one for around ~$10-15. Good luck & happy dive-logging!
Edit -- Did a couple of quick google-searches and found several of these are out-of-stock, but maybe there's still other similar ones around: