The manufacturers mentioned by rgurney, and almost all others have or can make their cables with rt. angle DIN connectors. I have a SME V and have used both straight and rt. angle DIN connectors with it.
The DIN on the SME tonearm itself is already a swiveling rt. angle fitting, so a rt. angle DIN is really not that important, unless there is very restricted room under your armboard due to the particular construction of your turntable and a rt. angle DIN would help route the wire out the rear.
Either way, always make a one-turn spiral loop in the tonearm cable right after the DIN connector and before the cable exits the back of the TT, to help de-couple the TT from any vibrations that may arrive via the tonearm cable!
The two favorite cables for the SME V seem to be the Hovland Music Groove 2, and the Cardas Golden Reference (not the Neutral Reference). They are both around $600 +/-. If however, you want the absolute best IMO (retails for 3x the price of course! :~) go for the Purist Audio Design Venustas.
