Musketeer Chess and House of Stanton sell a kit that includes the Dragon and Spider.
This is a quote from HOS:
Dragon and Spider Kit
The Dragon combines powers of a Queen and a Knight. It exists in many chess variants and is known by other names such as Amazon, Commander. It is among the most powerful pieces of the known chess variants. The Dragon top is pegged and can be removed (to handle with care).
This may provide what you need.....
I have seen online a few places that sell various chess variant pieces. I am looking for the Amazon in plastic. Does anyone know of a site or company that carries it? Thank you in advance.