Quick question about a part that came broken.

I recently got a daban kit in the mail and while I was expecting Chinese knockoff quality, I figured they'd at least pack to to where a part didn't break. They wrapped everything in bubble wrap and tape. It's a wonder that was the only broken part. The tape was wrapped so tight that the runners were bending. There are two of this part but I think the kit uses both.

My question is would it better to cement the part together or to do a resin cast of the other part? The part is flat and thin so I don't know if cement would hold without it going crooked.

I have the cement but not the resin or the silicone however I'm planning on doing a cast of a part from another kit so I'll have the resin stuff later anyway. I'm painting so my requirements are that it'll hold and that it's smooth enough for the paint to cover up whatever I do. I'm also not in a rush to finish this kit so time isn't a factor.