I've been looking to book a Lagoon 52 for May 2018. Several of the boats that CatCo has listed for charter are also listed on VISailing's website as DYC boats.
We have owner's time booked on a Lagoon 52 through DYC in mid-June. I don't know about any relationship with CatCo; however, I have since googled the name of the boat we have chartered and it is offered, with dozens of others, by other brokers. See PM for more info.