If you are here intentionally the kickstarter at the link below maybe for you.
Col Gravis has been at the forefront of keeping the GW idea of Praetorian Imperial Guard alive and kicking. He has now branched out and started producing his own bits and bobs via Curious Constructs.
The weapons carriage can have a life outside of 40K however. Try using it with Dystopian Legions or incorporate it into this new ruleset from Osprey publishing.
To quote Delboy: "The world is your lobster my son".