I found steel valve covers at Speedway Motors Auto Parts. They came with one cover, with two filler tubes and the other with none. They were les than $40/pair so I bought two sets and used the covers with the twin tubes. Got the correct breather caps at NAPA and
oil recommendation decals on line. I then welded 3/8" nipples to the rear tubes, for PCV ventilation. I did remove part of the baffle in one tube so
oil would pour in quicker. (read...I made a mess the first time I poured
oil in the tube)
A reasonably priced alternative and I like the looks. My 2¢ worth.