Where To Purchase Kickdown Linkage "Clips" For The Rods.

i don't know the diameter right off hand but here's a few leads:

https://www.oerparts.com/product/tf700512.html
https://www.autozone.com/screws-pin...sortment-5-pack/720706_0_0?cmpid=OSA:US&gQT=1
https://www.amazon.com/Dorman-41017-HELP-Linkage-Assortment/dp/B002ES5CQ8?tag=fabo03-20
dorman sells it in a variety pack so i'm sure you could peel thru their catalog and obtain a part number and order just the ones you need.