Get started with the Nitrokey HSM or SmartCard-HSM - Raymii.org
Honeywell CBL-500-200-C00 USB COILED Cable USB to RJ 6.50 ft 2 Meters HSM 5V | eBay
nShield Edge: USB-attached hardware security module - Help Net Security
SafeNet USB HSM Required Items
Luna USB HSM | Thales
Monster Cable Digital Life High Performance Mini USB - High Speed DL USB HSM-0.5 - USB cable - USB (M) to mini-USB Type B (M) - USB 2.0 - 5.9 in - Walmart.com
Thales USB nShield Edge HSM – Information Security Service
Hardware Security Module (HSM) For Modern Systems | Yubico