the first 2 are in a nut shell the same pump.
The one I ordered has a soft line barb 76-78 input and the output is the same. At least I can use my exiting fitting. The intake looks like I can unscrew the rubber hose barb and use my existing fitting but it's vertical. I need to use a 90* and then hopefully the existing line will reach.
I could try cacrquest. The napa pump looks to be what I want.