All you need is the logs. Here we have an Empire model VFSR-18-3 Millivolt Valve Vented/Vent free Slope Glaze Burner - Propane Gas fireplace burner. This unit was pulled from a working fireplace and replaced with a model that burns natural gas. Log kits are available from several sources, i.e., https://www.totalhomesupply.com/.
(Please note:A licensed gas technician is required for installation of this product. Please check your local regulations as some areas may require inspection after installation of gas products. It is highly recommended that you use your own gas technician or gas provider.)