in coles the psyllium is in the health food section with grains like LSA etc and I think it was in about a 250g packet.
pity about the sultanas cause just a handful of those works a treat with my boys. corn is also another one that works in a similar manner to sultanas for the boys. and as others have said a nice warm circular massage works wonders

hope it sorts itself soon so you don't have to take on other measures