I've lucked into 2 extra SS Chugger Pump heads. I purchased one that had an issue with the impeller (I didn't run it dry, I promise ). When I contacted the guy about it, he sent me two replacement heads. I'm not sure if it was an accident or not, but when I let him know about it he told me to keep it. So all I really needed was an impeller,and I ended up with 2 whole pump heads.
These pump heads will fit on March 809 series pumps as seen here: Ebay Listing
NOTE: Read the listing carefully. They do have some imperfections, but nothing that will affect the functionality.
I'm asking $30 for the one with an impeller, and $25 for the one without an impeller (the impeller from your march pump will work if you want to reuse it.) Add $5 for shipping, if you aren't local to the Indy area. I'd also do a trade if you have an extra ball lock cornie that you don't want.