make you own from
MAplin order code L49AL (NiMH D cell)
order code FZ34M (NiCD D cell)
not sure if NiMH don't need different charger than NiCDs
or from sea and sea
sea and sea
UK19901 Rechargeable Nicad Battery for C4R £ 54.43
can't find the adaptor plates for normal D cells - might be worth giving them a ring or see you LDS