I posted a thread on how I did mine last yearhttps://www.summitracing.com/parts/pfn-sr146h610sa
This is the one the psc rep recommended. It has the vented cap you mentioned.
Now I gotta figure out how I want to mount the thing, any ideas?
If the search engine still not working search thru the dates
Basically use the stock mount and take a piece of aluminum angle , radius the inside edge to suit the catch can, drill a couple of holes and attach to the factory bracket