In case your bastion strongholds weren't blingtastic enough, GW has put up bastion upgrade sprues from their existing city fight buildings. There are also some ork glyphs and a few other offerings. So g'head and build the bastion this fella would be proud of:
I think more than anything I would like to take walls from those buildings and fill in the underside of the new landing pad. That would make it a great piece of terrain for busting up line of site across the table.
Here are their offerings