If you take a look at the C50T or SE, you will see the OEM windshield.
At the time you buy your bike is the best time to negotiate a price.
I know Orca Bay Suzuki brings in most of there's with the SE package and if the purchaser does not want just puts them in inventory for resale.
Having said that you can talk to the dealer where you bought the bike and he may give you a deal.
The aftermarket has a good selection, but is expensive here in town, remember you must also buy the bracket.
I found Eric at Extreme Suzuki in the States to be good price wise and prompt to ship. I got my Mustang Seat from him, it was $700 plus taxes here and it cost me $450 landed.
If you want I will find his number for you.
Eric Wright 1-866-848-0355 if he is not in find out what day he is working and call him back, mention you are a member here and he will give you a better price.