This set of Grade 5 Ti6AL4V Titanium turnbuckles are made in the USA and is a great hop-up for your shelf queen and vintage racer (including rereleases). 
 
Compatibility includes:
1) AE Classic
2) AE Green
3) AE Clear

Also available with RPM Heavy duty ball cups: https://www.dragonpunchrc.com/product-page/rpm-heavy-4-3-duty-rod-end-ball-cup-set-16-pack 
 
Attached TB picture set is a generic picture.  Actual kit has 7 turnbuckles, 1x0.75", 4x1.375", 2x4.625"