To retain the classic quill look but want the height, suggest the Nitto Technomic. Commonly found and reasonable price. Offered in various heights to super tall.

I recently built a 1984 Trek 760 with the intention of using for a loaner visiting family and some nephews of varying height.

The last time, one if them complained to where we ended up swapping the entire bar, levers, seat post to another bike. More hassle and time than I wanted.

So now I have the 760 set up with an average but extended height Nitto Technomic stem and a matching but extra long Kalloy seat post ($13 all day 'long' pricing). The excess seat post buries into the seat tube and the stem lowers and hides enough for traditional look and fit. The only caveat when preparing for this quick adjustability is having sufficient brake cable for when fully raised.

(Loving this setup, matter of fact the entire bike complete with down tube index shifting. The kids can fly in style and experience a bit of old school.)