Various options:
1. Azad Hind upto KPG and KPG-SNSI by road - But Arrives KPG at an odd hour.
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2. CSTM Bound Trains and alight at NK. Just outside NK Station is MSRTC Nashik Road Bus Stand and you will get Taxis and Buses (Govt. & Pvt.) to Shirdi. Nashik has more options to Shirdi than Manmad, distance 20 km more...
more... than Manmad-Shirdi.
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From MMR, you will get pvt taxis, distance around 60 km.