Many Model Codes are reprinted in West's Uniform Laws Annotated. The ABA's Model Code of Professional Responsibility is reprinted in Martindale-Hubbell, with a cross-reference table to the Model Rules.
The American Law Institute (www.ali.org) publishes the Model Penal Code, the Model Land Development Code, and the Model Codes of Evidence and Pre-Arraignment Procedure. At least the Model Penal Code is published in Uniform Laws Annotated.