I know that jigs are a popular subject in this forum.
I came across this when looking for something else. I have used Reid before
to replace hand wheels on old iron.
The request catalog page is here,
http://reidecom.reidtool.com/xephr/edit/CATALOG_REQUEST
They have four catalogs. All are available as downloadable PDF files.
The jig and fixture catalog PDF download site is.
https://www.reidtool.com/catalog/jnf06/jnf06.pdf
It is a 68 page publication.
This may be overkill for most. But it wouldn't hurt to have this publication
around to steal some ideas on more ordinary jigs.