Ford never designed one and only reason i can think was to save costs.There only two versions going about,cosmetic one that looks cheap but spose to be better or the thin metal sleeve.ive only had the metal sleeve version that has flange one side with no problems.
I know what you mean about ford gaskets are best.been down that road..
If you know someone who has the right tools,then get both skimmed for flat surface.studs will get in way tho.