Your 2 best options locally are OptiMate 3 (I have 2, 1 on each 'bike) or Benton BX-1 (Benton is similar to the C-Tek range, but at half the price).
I have a Benton BX-2 on my Land Cruiser, which is their top-off-the-range model, with more options/versatility than the BX-1.
I also work...