Anyways blinkers flash way too fast with led's and i got qouted $80 for a led flasher unit, or $30 for 2 resistors.
Finally with some help from my auto sparky mate figured out that you can use a 2 point flasher unit that costs about $12 and plugs straight in to the fuse box. Just make sure you do not get it the wrong way round or you will blow a fuse.
STANDARD looks like
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Led flasher should look like
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If you put it in like this you will blow fuses
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Part number is Bosch Flasher Unit P122
There is a equivelent narva item also.
Note that the new flasher unit is round and replaces the square one so there are no clips to hold it in so i taped it on as a precaution.
I dont use a fuse box cover either and am unsure if it would fit over the round flasher, but it looks like it would.

cheers mick