Slot drill disposable long FS HSSCo8 type N 8mm FORMAT

Has anyone had luck making a slot in a commercial PCB by getting them to drill closely drilled holes 8mm or so for the tabs of barrel jack

2 FLUTE SLOT DRILL 8MM DIAMETER 2 FLUTE SLOT DRILL, 8MM DIAMETER 8 x 10 x 11 x 60mm 10mm STRAIGHT SHANK, HIGH Read More

8mm slot drill I have bought top quality Sutton but at $35-$45 each they are a bit pricey Just looking for between 3mm and 8mm Plain or threaded

slot 365th The Sangeo DGA series uncoated carbide 45 Degree helix cutter has 3 flutes and a plain shank These slot drills range in diameter from 1mm-20mm