Technical Help identifying Model a Riley ? Finned covers

Hey all, can’t figure these out exactly..look possibly Riley related but not finding any to compare too. Thoughts? Thanks all !

 

Interesting/ I don't know if this helps.Here's a pic of my Riley 4 Port.

 

From ebay!

 

Maybe a Riley aftermarket speed part?

 

Not sure about the fins or who made em, but appear to be covers for a Riley 2 port head

 

Bump anyone need em? $100 ?