Yeah, the 4 season valve will work and probably be much cheaper than the bakelite piece...
Make sure you know what/if the bracket comes with it... Most replacements won't have the same bolt pattern as your inner fender I've had to make or modify the brackets so there isn't a bunch of extra holes in that area...
Those style valves will work fine securing only one hose but you may need to fab an additional bracket to help hold the other heater hose in that area simply to keep it up and out of the way..
Lastly,keep it simple and use a vacuum piece like the one pictured I'm not sure how you would incorporate a cable operated unit without a big process and a bunch of your time..