I’ve used the Dubro hand held pumps for decades in my aircraft and 1/5 scales without a problem and it even works to remove the fuel from the tanks when finished running.
As for a complete system I can’t recall seeing one, not that I’ve really looked.
The V2s were released in 2008.
Then came the V3 and V4 so unless someone here is willing to sell theirs or you can find them on fleebay your going to be SOL.
Good luck in your search. :)
What most of us do if you haven’t already is replace the spring on the brake rod with a piece of fuel tubing.
Once that is done if it still doesn’t work well enough to your liking is pick up a set of RCR brakes.
One last thing if all that doesn’t work you’ll need a more powerful servo. I’ve...
If you want to keep the 5B look there's nothing wrong with the stock cage, it's the stock plug protector that sucks. I'm running the TGN unit on my rigs and it allows you to remove the plug without having to remove the guard first. Another great mod are the Modified tubes for quick and easy cage...