I 'think' they are the same ... but couldn't guarantee that for you. It'd be easy enough to crawl under & check to see if they look alike. They aren't a precision piece so close enough is good enough.
I hope the boneyard is going to pull them for you. It's about a 4 hour job to pull them.
Also, there's about a 25% chance that you'll need to replace one or more of the bushings where they mount to the frame. I had to replace 2 of them whenever I was getting them modified for other members.
Remember that there is a member on the board that sells the modified brackets. Contact Joe Darlington for price & availability. I have an unmodified set if he doesn't have any cores at the moment.
I have no idea if the crossmember is the same between Trooper & VX. You could probably get one from Calmini though if you need one but Joe also sells brackets to drop your crossmember to allow for the diff drop.