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I had a simlar scope but f/5. At the time GSO provided a cheap low profile focuser. From memory the barrel height was under 50mm for a 2' diameter.
You said you can focus on the moon. Are you full travel on the focuser at this stage or do you still have a bit to go in? Because if you can focus on the moon then the stars are really pretty close as well. What you could do is take any adaptor off the camera, hold if flush to the focuser barrel fully racked in then point the scope to the moon and check live view to see if you are focused. With a bit of luck you might have to rack your focuser out. If you have let's say 10 to 15mm of travel to focus then you might get away with a very thin adapter to hold your camera. Your scope is 1000mm FL so unfortunately I doubt you'll see any stars in live view at that FL even at high ISO. If you're still out of focus then the easiest way would be to get a x1.5 barlow. Otherwise chop 10mm off the bottom of the tube to get the primary cell closer to the secondary.
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