I have some KST X06 and KST X06H servos.
$49 each

KST X06 Features
Ultra slim 7 mm body - the thinnest metal cased servo in the world
Compact and light weight design
Good torque and speed
Wide 1S to 2S LiPo voltage range
Excellent heat dissipation
7075 Alloy casing
Hardened Steel gears
Designed for lightweight high performance RC Gliders



KST X06 Specifications
Body dimensions 20.0 mm wide x 7.0 mm thick x 16.6 mm high 0.79" wide x 0.28" thick x 0.65" high
Max dimensions 28.0 mm wide x 7.0 mm thick x 19.3 mm high 1.10" wide x 0.28" thick x 0.76" high
Stall torque (3.8V) 0.8 Kg.cm 11 oz.in
Stall torque (6V) 1.5 Kg.cm 21 oz.in
Stall torque (8.4V) 1.8 Kg.cm 25 oz.in
Weight 6.4 g 0.23 oz
Lead length 15 cm 5.9 in
Operating speed (3.8V) 0.12 sec/60°
Operating speed (6V) 0.08 sec/60°
Operating speed (8.4V) 0.07 sec/60°
Operating voltage 3.8V to 8.4V
Operating temperature -20 to +65 °C
Bearings 1 ball bearing
Gear material Hardened Steel
Case material 7075 aluminium alloy
Motor type Coreless DC motor
Working frequency 333 Hz
Dead band/resolution 2 µs
Pulse width for ± 60º 1000 - 2000 µs
Digital Yes
Programmable No
Position feedback Potentiometer
Supplied accessories 4 output arms, 2 arm retaining screws, 4 mounting screws