The best reflectors are often the simplest, the classic 2'x4' bead board from Lightbulb Rentals has a white side and silver side.
Background Support Kit (5′ to 12′)$35/day
Mafer Right Angle Pin (5/8″ Snap-In)$3/day
Autopole/Polecat: Manfrotto Deluxe 2 (7′-12′)$15/day
LS 1200d Four-Light Bracket Aputure Series$90/day
Sandbag: 20lb$3/day
Heavy-Duty Adjustable Background Crossbar (4.8′ to 13′)$7/day
Universal Phone Tripod Mount$5/day
Female Jr to Female Baby Adapter$5/day