Hi mate, i had a similar issue with an old 1/4 inch BD router i wanted a bush to fit the base or something like that..in the end i sent an email to Axminster Tools explaining what I wanted and they checked the compatibility through all the manufacturer spec listings…
They identified what i needed and sold it to me – might be worth a try, I expect Axminster sell things that fit trend other OEM bits an pieces..
contact details below..
Axminster Tool Centre Ltd
Phone: 03332 406 406
Email: Alan.Jones at axminster.co.uk