Hayashi Racing is now making some lovely cast aluminum rocker covers for the Nissan A-series. Available in black or red (the blue one above is a custom job for a Hayashi Formula J race car). We expect most of these to be sold in Japan, where modifying Sunnys and Sunny Trucks — not to mention the TS Cup vintage racers —are a big deal.
There is a threaded hole for the L-shaped pipe for blow by, and the Hayashi oil cap is not included. The item is priced at ¥120,000 or $1,100 USD, but that seems pretty reasonable compared to what vintage aftermarket rocker covers cost.
If there is enough interest, they may make a similar item for the L-series. If you are interested, let us know in the comments below.