Russ Broxtel was a janitor, a member of the custodial staff at Stark International who was barely noticed by the professionals around him. Broxtel took advantage of that fact and accessed the computers of his employer to obtain the Firebrand costume. The Firebrand costume was created by Gary Gilbert a former Stark employee.
The figure started out as a Captain Marvel and the head was scrapped down and a new head was fully sculpted. All costume detail was sculpted and a paint job later you have Firebrand!
The figures contained in the Custom Showcase are not for sale by Figure Realm, and the creators of the customs are no way affiliated with Figure Realm. The Custom Showcase is purely for entertainment purposes and only provides a means for the creators to show off their work and trade ideas. Figure Realm does not make or sell customs.