http://www.bhphotovideo.com/c/product/751563-REG/Marshall_Electronics_V_LCD_HI_V_LCD_HI_Camera_Horizon_Indicator.html
180
http://www.bhphotovideo.com/c/product/786650-REG/Marshall_Electronics_V_LCD70XHB_HDMIPT_CM_7_Field_Camera_Top.html
600
Steadicam 3 pin to XLR Power cable for monitor available for this as well.
Steadicam Zephyr low mode kit
http://www.bhphotovideo.com/c/product/192878-REG/Steadicam_078_7393_01_Mini_low_mode_kit.html
300