Best will be to travel till MAS and then travel to SBC. 02841 has current available tickets in 2A right now from HWH to MAS. Book them, and plan MAS-SBC leg accordingly. This stretch won't be too difficult as there are good number of trains & buses plying from MAS to SBC.
Even 22807/SRC-MAS AC Exp has Tatkal available for 3A right now. This will be more cheaper & reliable than 02841.