A nice spotting scope would be best, by far, however you could use a smallish refractor and an erecting prism. You can get an erecting prism 90 degree diagonal, like this, but they're for refractors:
http://www.scopestuff.com/ss_diag6.htm or
What's different is that these have a roof prism inside so light going through is reflected off two surfaces, and hence the image is right-way up and left-right orientation is also correct.
There is a second type that use a pair of wedge-shaped prisms to achieve the same but deviate the light path by 30, 45 or 60 degrees, more comfortable for terrestrial viewing:
http://www.astronomics.com/main/Imag...E38XSE1/Page/1
Putting an erecting prism into a Newt with a low-profile focusser, you may be unable to focus. The solution is to move the primary up the tube a couple of cm. Refractors may also be unable to focus if the drawtube doesn't have enough travel inwards.
Personally i would suggest a spotting scope or a small refractor would be the best option.
