that does sound like the Extreme...the 12 gram plug had a cam lever on it if memory serves. The Pt Jr. and others like it had a screw in plug for the 12 gram. As far as parts...good luck. 32 degrees isn't supporting it anymore...you might be able to find something on ebay.
A man walks in to a bar and hands the innkeeper three nails and asks "Can you put me up for the night?"