Here's the selection of Liam 3D conversions sets and kits available from their eBay store.
HUMVEE Shelter Conversion Kit (for Tamiya)
AN/TWQ-1 Avenger Conversion Kit (for Academy)
HUMVEE Cargo Conversion Kit (for Tamiya)
M1152A1 with B2 SECM (for Academy)
M1165A1 B3 Uparmored Conversion Kit (for Academy)
All these are available at eBay, or via direct email contact: liam3D@naver.com