When my boat was delivered to the dealer that had originally ordered it, it did not have a rocket launcher mounted.
When the first owner bought the boat (he did not order it and I am the second owner), he ordered an OEM launcher from the factory through the dealer where he bought the boat.
The design of rocket launchers has changed a little over the years.
Mine is a 6 rod launcher with polished stainless tubes that are not flared, and it has a tab for mounting a single cockpit flood light, but I used that tab to fly my flag in a fabricated mount.
Later launchers had flared tubes and some were anodized gold as the styles and tastes of the public changed over the years.
Personally, I like the older straight tubes without the flares, but you might be different.
A couple of years ago I discovered that the original owner never sealed the wood core in the top when he mounted the launcher, so I repaired the top and added polished stainless backing plates top and bottom.
This thing isn't going anywhere now. :wink:
If I were you, I'd start with your dealer to see what he might be able to get.
If he can't get you what you want, you might want to call the factory.
I believe Parker uses a local (to them) fabricator to do their pipe work, so if you can get that fabricators number, I'm sure you could get an "OEM" launcher custom made.
Good luck!