http://www.geocities.com/turbogaming/That's the one you mean, right? Well, shipping a Duo from Europe to the US and back by registered mail would cost at least 80$. Add 60$ for the repair and you might as well buy a working one on ebay. Wonder where he gets (new) spare parts?
I've searched all over the net and I couldn't find any information at all concerning replacement lasers for PCE. I am not an engineer, but shouldn't it be possible to exchange the laser diode itself once it dies?
Who's got any detailed info on the Duo/Duo-R/Duo-RX's CD-Rom unit? All I could find is that it's a "Single-speed CD-ROM drive, managed by a NEC microcontroller and using the SCSI-I interface"
Hopefully someone will come up with a solution, for WE ALL will need one eventually.