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,
They have four catalogs. All are available as downloadable PDF files.
The jig and fixture catalog PDF download site is.
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.