The Kury inserts like that are about 100 a pair. I had thought of going the insert route till I found that out. That's why I said the ones you showed were cheap. Maybe realisticaly affordable is a better term

 

The ones that I have on my bike, I think are the Kury set, maybe not... I don't know. They were on it when I bought the bike, but the three lights in the rear flash 8 or 10 times when I hit the brake and the turn signals flash amber and the brake light modual also flashes with an amber directional arrow, left turn right turn. I always get positive comments on them. I highly recomend them.

 

Look at Adjure for complete signals the Bullets are great. http://www.adjureinc.com/bullet-lights.html If you just want the lense they are having a good sale http://www.adjureinc.com/dibloutit.html You never mentioned your pricepoint