High waisted trousers for athletic physique
A lot of the 'trad' (vintage American/Ivy League clothing) stores will have trousers with long rises. I know O'Connell's, Ben Silver, and J Press have options for Long, Regular, and Short rise trousers for their store brand trousers. I find the short rise trousers there to correspond with regular rise trousers elsewhere, so I'm assuming the long and regular options will suit your needs.
You could also check Bill's Khakis M1/M2 models as well, but I think they will be fuller cut than the above options.