In the 3rd issue there's a single shot of an autobot battlecruiser, which in my opinion looked a lot like the Japanese SkyGarry.
A few weeks ago I Found a KO SkyGarry at a local thrift shop, thus finally getting around to repainting it into the Xantium.
This is the Xantium from the comic:
Here is the result:
[EDIT]
Treadshot A1 from TFW2005 made me realise it did need those BFG's on the front side. Here they are:
