Desulfator
I found this desulfator circuit in a link on this thread:
here.

Circuit courtesy of Ron Ingraham
i live in new zealand and im currently sourcing parts.
Transistors:
Q1 IRFZ44V - RS # 2509055009
Q2 2N2907 - Jaycar # ZT2322
Capacitors:
C1 100uF 25V Low ESR - Jaycar # RE6322
C2 47pF (0.047uF) Ceramic - Jaycar # RC5320
C3 4.7pF (0.0047uF) Ceramic - Jaycar # RC5308
C4 100uF 25V Low ESR - Jaycar # RE6322
C5 10pF (0.01uF) Ceramic - Jaycar # RC5312
Diodes:
D1 1N4744
D2 FR602
D3 1N4148
D4 1N4148
IC's:
NE555 - Jaycar # ZL3555
Inductors:
L1 1000uH
L2 200uH
Resistors:
R1 100Ω
R2 15KΩ
R3 100Ω
R4 270KΩ
R5 15KΩ