I don't know about that number Luke but yes...locating an NOS unit could be an interesting and expensive challenge. The one I had was #1517501. Around 4 years ago I rebuilt one and I may have it around here somewhere. It took me weeks to do, but it did finally work okay.

However...please let me tell you something about that unit which pretty well promises it will last about 4 or 5 years at the most. I corrected this on the one I rebuilt, for what it is worth. The OEM unit only had one pivot point and it should have had 2. The shaft which operates the wiper (across the resistance coil) only pivots once and it swings in a pot metal case which is softer than the bar which makes the shaft. So, what it means is the hole in the case wears rapidly, the shaft moves around at will and the sender becomes very erratic and inaccurate when this happens. Occasionally (as mine did) it hangs up inside and the action of the float ruins the wiper piece. I had to make a new button for it in order to make it work again. Aside from rebuilding, establishing 2 pivot points and installing a brass or stainless piece to act as one pivot bearing, there isn't anything one can do to remedy this.

You can see in the 4th image below where I made the shaft into a T (instead of an L) and ran the other side out through the back side plate.

So what is a mother to do? Well, the 0 to 30 ohm sender made in Taiwan and sold on eBay by a seller known as renbusan (think it is about $30 including shipping) is the best sender I've found. Good luck with your search. If a working sender is what you want and you want one that will last, I'd get the one on eBay.
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Last edited by Jon G; 09/13/2024 12:57 PM. Reason: add explanation of an image

~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end