Honestly,.. if you are looking to replace the stockers in the same hole,... I'd recommend pulling one and studying the mounting system..
Most aftermarket signals,.. will mount with a threaded shaft, going through a fender hole, and tightening with a nut...
Very common,.. but not at all like a factory signal,... which is more of a,.. shaft in a tube,... pinned with a screw...
... but,.. as I said,... any signal can be adapted...
You simply must find a hole,.. or create one...
Search Ebay for motorcycle turn signals... and you will see the full range of options and prices...
LED's will require a an electronic flasher module,... to modulate the blink rate... They are available at any auto parts parts store for $10 or so...
I prefer incandescent over LED,... for guaranteed visibility, and availability of replacement bulbs...
Amperage savings on a blinker, is minimal...
I also recommend a light that takes 1156 or 1157 bulbs... for availability and visibility... (smaller bulbs are useless,.. and LED's are an iffy proposition... Some can be bright, but, many are barely visible)...
JMHO...
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