starmember,
I assume you mean the one that mounts to the engine cover.
There are a couple listed on The Samba for between $175 to $250 US.
Use the search engine for the classified adds, isolating parts- ghia to get the listings.
The Samba
KGP&R list them as well, but they are currently not availible. Their pricing was a bit better at between $120 and $195 US
Good luck in your search.
Doug