7 tooth, the best you can do is replace the felt seal with a "tube" version. And - according to Snyders - fit on these can be "no-fit". So check according to their instructions.
If you're a "no-fit" it may be time for new felt seal. Or disassembly to expand the hole and make it come together for above.
https://www.snydersantiqueauto.com/o...etainer-w-tube
Joe K