Hi Aaar Vee
you can download the B1 installer from this link:
http://service.sap.com/sbo-swcenter
After installing, you will have 30 days trial version. You can run B1 without using license.
The demo version is available from this link:
https://websmp108.sap-ag.de/~sapidb/011000358700001244582009E
you may contact SAP local partner in your country to download the B1 installer.
With Regards
Balaji Sampath