I got some off eBay from China about £3.60 for two .. each with 68 SMD .. (surface mounted diodes) ..

On the earlier Bongos it's an easy job to get the front indicator / side light units out .. just remove the one top screw and pull the whole unit forward .. it maybe a bit stiff as there are two 'tongues' on the (black) light unit that fit into two slots on the (grey) headlight unit ..

The old bulbs are a simple 'twist and pull' to get them out of the side light unit ..

Quick tip .. the LEDs will only work one way round .. before fitting into there into the light units .. fit into the holder and test .. if it does not come on .. remove .. turn the LED 180 degrees .. re fit ..

I sprayed some WD40 on the rear of the light units and the retaining 'slots' and the units slid in easier ..