I have no pics tat would be helpful. I can take some details/closeups but I've never been successful sharing pics on this site. Maybe if you email me (see member area for my email addy) I can send them to you that way.
Yes, there is a large SS tube that fits into the vane. The tube extends forward (toward the bow) into a bronze 'T' adapter. On each side of the 'T' are two smaller SS tubes (1 1/2 - 2") that fit into bronze supports that are each bolted to the boomkins. Between the vane itself and the T-adapter is a bronze support that clamps around the large diameter tube and bolts to the SS boomkin crosspiece (where the aft shroud is attached).
Of course the mounts (mid support, 'T' adapter and boomkin supports) could be stainless and not bronze but would require a machinist to fabricate. Unless you have a connection you might be looking at as much to fabricate a mount as it would be to buy a more current model.
There is a public Aries windvane group on FaceBook. I've seen the Bronze & SS model on it a couple times. Might be someone with some spare parts lurking there.