What are you trying to achieve? Reduce body roll? Better straight line running and lane holding? Reduce wind push from weather or passing vehicles? Less jarring from poor roads?
There isn't a single bolt on product, tweak or change that will do all and if your RV budget is limited then your need to prioritize what you want to chase first. If you can't do the work yourself the costs will quickly escalate and consume your project budget.
Henderson's radius rod sounds like a front track bar. You might have one if the you have a 18,000 lbs chassis. It's optional on the 16,000 lbs version. Easy to check. The attached image is looking front to back and the track bar is just above the front axle in the pic.

Regarding CHF, there are thousands of owners who have driven thousand of miles with no failures, myself included. Keep in mind they are in the business of selling improvements not advising you to try a no cost alternative.