Many good posts and points made so far. Number one, call the ESP company and complain to them, since this dealership seems incompetent at best. It sounds like nothing was handled properly on the first "repair", including using non-standard pushrods. And if all they did was cut out the pushrods and replace the lifters, with the kind of failure you had they probably missed a lot of other damage. It would be extremely rare to not have other damage when a lifter roller actually fails. At the very least the cams would be shot, and the bits and pieces of broken parts would have usually done damage elsewhere. Check the repair order and see what they actually did, or at least what they claim they did.
If they installed stock "C" lifters, your noise isn't necessarily due to loose pushrods btw. Those lifters are a problem in a lot of engines, and definitely in a 110. Many failed at 10k miles in stock 110's, and the failure rate and warranty costs got high enough to cause Harley to change to a different lifter for the 110's back in 2013.
Jerry