Curacao right now you would buy a Sublicense from one of the four existing Master Licensees.
However, the licensing regime is going to change in a few months, so you will need to apply for a new license after the grandfathering period (one year I think)
You can either wait for the new regime to enter into force or still try to get your hands on a sublicense (perhaps against a reduced price...), knowing that you have to re-apply in a year or so.
Re. shelf companies with a license I don't know, tbh. You might ask around at some of the corporate service providers︀ on the island to find out. The ones I know are TMF and Vistra, they︁ are reputable but I recommend you compare prices.
P.S. Sorry if this reply comes late.︂ I don't come here very often.