Most folks will consult with an "offshore specialist" or a qualified tax attorney in the US or country of residence. This professional will contact the various service providers in the "offshore" havens to set-up what is required to form the structure. Some are simple and some are complex using foundations, trusts, IBCs, bank accounts, etc. in various countries.
Almost any attorney or accountant can open an IBC for you here in Belize with a bank account. It may not be in your best interest depending on your goals. You want to be set-up properly in the event the US does find out, you will want all your bases covered.
Tax evasion is a lot different than tax avoidance.