Where can i find some without paying for shipping? I need a detent ball to go into the elevation adjustment of my kalinka optics kobra. I took it apart and lost it. I lost the ability to click my adjustments. I put a number 7 shot in there and it works but it is loose. I do not know the exact size of the ball, but i have the other one inside of the windage turret. Ideally I wanna stop by somewhere and compare my existing ball with different sizes, and buy a few. Someone in San Antonio with a bag full of detents please reply. Thanks for any info in advance.