The scope came from a toy gun purchased at Wal-mart. I literally took the scope off, painted it and mounted it on this rifle.
http://www.walmart.com/ip/Adventure-Force-Toy-Swat-Operation-Rescue-Pistol/17247606
The only approved blaster for a Biker Scout is the hold out blaster. However, some of the SW games show a TB with a DLT-19 that has a scope. I modeled mine after that weapon and only use it at non-canon events. Hope this helps.