Sorry - In answer to your question: NO. And, I looked for several years.
I really like my OF 1400 - And it’s my “go to” router for most all my hand held router tasks.
But, I had to find a “work around” router solution to use with my Leigh D4R Jig.
Making a sub-base yourself for the OF 1400 - With the exact centering accuracy needed for jig dovetailing - Is EXTREMELY difficult.
Pat Warner (RIP) - A Craftsman/Seller of many types of precision engineered, clear router sub-bases - Never would make one for the OF 1400.
My solution:
A modestly priced, dedicated Porter Cable 690LR Router - (currently $129~ at Amazon).
There ARE multiple purveyors of low cost, clear sub-bases for the 690LR.
Works wonderfully for me. I can see “where l’m going” when I’m dovetailing. [wink]