The two fittings I bought from Amazon were:
1) Anderson Metals Brass Tube Fitting, 90 Degree Elbow, 3/8" Flare x 3/8" Female Pipe
2) E-BAYKER Propane Hose Adapter Connector Fitting 3/8" flare M x 1/8" MNPT Fits Propane Single Burner Outdoor Camp Stove Propane Gas Cooker Appliances for LPG Propane Tank Gas Hose - 100% Solid
There is a good YouTube video on this conversion:
Bob - for me, yes it was a case of wanting to use the grill I already had.