Attwood Letter Number Kit - Black [14142-7] Communication | VHF - Handheld and once the 4-in-1 adapter

and once the 4-in-1 adapter is removed you can store the hose in standard 4-inch square bumpers

Black 2/0 AWG Battery Cable - 25'

The Belt Buddy Mechanism which goes with most any adjustment arm is part number BBU

IDC-100C-12 isolated DC-DC converter is EMI/EMC compliant and conforms to European standards EN50081-1 (for EMI) and EN50082-1 (for EMC)

Attwood Letter Number Kit - Black [14142-7] Communication | VHF - Handheld and once the 4-in-1 adapterLetter & Number Kit Black Features: 3 inch, waterproof vinyl, pressure sensitive labels Resists fuel, fading, and scratches Kit contains (Black Pieces): Four of each letter and number, plus twelve dashes totaling 148 pieces *Meets USCG guidelines Quick Guide (pdf)