Unfortunately, when folks started making replaceble hangers they thought it was an opportunity to unleash their frustrated creative impulses. There's no logical reason, but there are a staggering number of different hangers. Even though there are over 50 existing versions already, folks still feel none are "just right" and start fresh.
That means that there will be many examples like yours where the original hanger isn't available. Your best bet is to try your luck at the Wheels mfg website, and see if they happen to have an analog. If not, see if there's anything close enough that you can modify to fit with a file or coping saw.
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