Do a 700c and a threadless conversion on it. Once you do that you can find a Carbon fork from Ritchey and possibly others in 1" threadless and easily find stems or shims for 1 1/8 threadless stems. However the bike might not be worth putting that sort of money into it judging by the components you mentioned. A 700c conversion probably wouldn't be as bad because you can find brakes and wheels fairly cheaply and there are 1" threaded forks maybe not light but cheap.

Here is an article that would help get you started:
https://velo-orange.blogspot.com/201...ake-reach.html

Honestly you might be better off considering a newer bike.