12v 23w bulb, what part?

I have a set of small after market turn signals that came with my bike when I bought it. One has gone out now, and I dont know what the part number is for the replacement. The only writing on it is 12v 23w. I have tried several bulbs that look the same, but none will blink. Its not the relay because one side blinks fine. If I switch the bulbs the side with the old 12w 23w work. I just cant find a bulb that is exactly the same. I have looked at autozone, straus, local hardware store. No one can help me unless I have a part number like 1156 or something. The stock bulbs are too large, there are exactly the same, but smaller.
Can anyone shed some light on this issue!?

Have you tried searching on-line bulb companies? I entered "12v 23w" in Google and came up with many companies selling bulbs of this rating, and some looked different from each other.

Are you looking for a bulb with a smaller glass part?

I have searched like you said. But while many sites came up, I havent been able to find a 12w 23v bulb.
Can you give a link for a site where you saw them?
Thanks. I am assuming there must be another part # other then 12w23v.
Thanks for your help,
Jay

alright I officially put on the idiot hat! I was putting in 12w 23v. Yeah that would mess up my search.
Thanks for your help.

www.topbulb.com/find/visual.asp

tinyurl.com/39fh6k