Connecting an IrDA peripheral to my MacBook Pro?

Recently, I got into SCUBA diving and just finished buying all of my gear. As part of the package, I got a dive computer which is supposed to connect to a PC via infrared. I know that the port on the front of the Macbook Pro is only for receiving information from the apple remote so I'm not even trying to go that route. I've been looking all over the place online to see if someone (anyone) supports a usb IrDA periph that will work on an intel based mac. My diving instructor lent me the one that he uses with his PC (Uwatec MA-660) and it works beautifully with JTrak (the divelog software) through Virtual PC on my G5 tower. There is also a great looking version of JTrak for macintosh (which is also universal) but I have no way of connecting to my dive computer. And of course, Virtual PC doesn't run on intel based macs. I'd so much rather use native macintosh software anyway. Does anybody have any idea if there is such a thing out there or at the very least when something like it would be coming out? Or where to look?

Thank you much!
Jim.