Just ring up Bintel, they'll have the adapters you need. Tell them your scope and camera, and you're done.
However if you're expecting to do long exposures on your new shiny dob, I wouldn't bother with your T adapters. No tracking = no long exposures.
If you're planning on using your dob+SLR for lunar/planetary imaging, it's a pretty tough way to do it with film. You're much better off using a digicam or a webcam,
like I have done.
Hope that helps.