It's a standard size spacebar. Any spacebar from any standard keyset will work. Which one you want is fully up to you.
No one here can help you with that (unless someone over here wants to mail you a spacebar they don't need, which will cost postage and time). You're better off contacting the place you bought it from and asking for a different spacebar from them. I think Josh at mechanicalkeyboards.com/tigerimports has given people replacement spacebars before (provided you were their customer). Otherwise you can get all new keycap set. If you only want a backlit compatible spacebar then any of the Ducky Shine series spacebars will work.