Look around Ebay for the CT parts you need.

However, if you like Craig's (tuna) idea those are Honda Ruckus turn signals.
I looked for a fair number of weeks on Ebay, most were selling with the bracket (virtually a turn-key install) for about $40-$50, and just the stocks and lights were going for $25-$35 for a pair, then I saw a pair of stocks and lights for $15 and it was a Buy It Now, so I got them. I do like the way they are tucked inwards and not sticking out as far as the original CT rear turns signals.

Paved roads, just more needless government spending...

I pick up my mail in Santa Barbara, California, USA.