If you still have the collet nut, you might want to try your luck with similar collets with circlips for Porter-cable routers.Hi Tom,
Thanks for the information!!
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This is an image of the thing - it was listed a long time back by ereplacement parts (bottom pic and I hope I am not in violation of any of the rules of this forum), but no longer. The groove near the business end is for a circlip/springclip to keep the cone with the collet. I ran an "Image" search as well using these pics, but with no hits! I know I am not imagining the thing because I have a physical specimen, so someone must have made it at some point!
View attachment 403474
Steel Replacement 1/4In 1/2InRouter Collet part for Porter Cable 42999 / 42950 | eBay
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If you suceed, pls report back to help fellow Craftsman users.