Nite,
You can get the ROMs from
www.dragons-lair-project.com.
However, you also need the VIDEO FOOTAGE. Daphne does not tolerate downloading this from the internet at all. You have three options:
1) Buy a Game Laserdisc, and a Daphne supported Laserdisc Player that is compatible with your disc and TV type (NTSC/PAL), as this will output to TV. See Documentation for a list of supported players, and the proper cabling. You can try Ebay and used game dealers for this. This works with Dragons Lair, Space Ace, and Thayers Quest only, as other games need overlayy
2) Buy a Game Laserdisc, any LD Player that is compatible with your disc (NTSC or PAL), a video capture card, and capture your own MPEG1/MPEG2 and Ogg Vorbis dumps, and make a framefile. This is the only way to play games that need overlay such Esh's Eurnmilla, Super Don Quixote, Astron Belt, Galaxy Ranger, Cobra Command, Bega's Battle, Cliff Hanger, and others.
3) Buy the DVD-ROM or Twenith Anniversary Edition DVD-Video versions of Dragons Lair or Space Ace, and download the DVD2Daph program, and convert the DVD to a daphne-usable format. This is an easy way to go, since no capture or special hardware is required, but the quality will be lesser than a capture. Also, these are the only two games that have usable DVDs right now.