As most of you know, I am contracturally forbidden from including or providing images of the Unseen (LosMechs) with HeavyMetal products, or on my web site. In fact, my list of Unseen includes even more recent designs, such as the Clan Behemoth and Baboon.
To help out in this regard, Medron at PRI has accumulated from a "variety of souces" a bunch of graphics that include many/most of the LosMechs, and has them available for people to download. There are 65 graphics in a zip file, which you may want to then unzip into the appropriate /Bmps directory of HMPro and HMVee (I believe there's a vehicle or two), giving you a pretty complete set of graphics available for use with HMPlus.
Medron has posted the LosMech pictures on the HeavyMetal Pro Featured Products page, at: