Ammo, sorry to hear about your luck. Might try a local dealership to see if they have any take-offs. My dealership had a few signal arms and lenses from new bikes that customer's had LED's or different signals put on before picking up their bike. I picked up some lenses for a fraction of the cost compared to new when I wanted to tint mine.
Advantage of something aftermarket is they won't stick out near as far, but you'll probably want to replace front and rear, add the load EQ. Depending on your budget, might just replace the broken one for now.
'09 Kingpin 8Ball
'06 HD Road King
'06 Vulcan 900 Classic