Dreamcast Controller Adaptors?

[DJ_Izumi]

That is, to adapt OTHER controllers to run on Dreamcast.  The Dreamcast was never a huge success and finding accessories for it is admittidly tricky.  The standard DC controller, while admittidly somewhat inovative in design also isn't the most comfortable.  ...And with VMU and rumble pack, it's heavy as hell.  (But hey, I got two rumble packs for $2.99 each! )

I'd like some suggestions on adaptors to convert other platform controllers to DC.  Probably PS2 since that seems to be the most common controller and has a lot of arcade sticks, wheels and other stuff for it.  Maybe with my Mad Cats MC2's on Dreamcast, Daytona USA won't be such a terrible and twitchy game where the tires are made of butter.  (Not to insult the Model 2 and Model 3 outings for Daytona USA... Just the Dreamcast port)

[northerngames]

there is ps1/ps2 controller/wheel to DC adaptor