No , the original producer wasnt tooling up to make anymore but its a simple enough design and the GM TPS should be easy enough to source.
I ended up getting one second hand from TRS in Adelaide for about $80 for that car..
Small update on this for anybody that might stumble on those. I think the two part numbers above are different parts. I ended up ordering the 17106681 TPS, and the one I got was reverse rotation from the Rover one. This part number also crosses over to TH42 and 213-895 along a bunch of other ones.
I'm now ordering the TH40 which cross references to #17081545, and 213-897. Hopefully this one will be the correct rotation.
Thankfully, you can buy cheap copies for $6-$7 on ebay so experimentation is pretty cheap. If I get it working I might end up getting a better quality one.