Scratch build.
Brass tubing, plastics, fiberglass, aluminum, add detail to a standard gear. Robart sells a plastic oleo strut kit that fits over a standard wire gear to help dress them up. Of course, as was said above, most manufactures sell a scale gear for the jets in question, they're not dead scale, but you can sure dress them up. A quick search will show you some incredible F18 landing gears that have been done up dead scale, but I forgot, you don't like to use the search, that requires effort