Bar end weights are intended to suppress vibration and 'tingles'. If you want to consider other options just look at the literally 1000's of variations on the theme for archery bows to reduce bow limb vibration and string slap. Sand, rubber, hydraulic, steel, plastic, stick on, screw on, 1/2" to 4 foot long. There are more rubber versions alone than you would ever see in an Adult sex toy shop.
Many aftermarket grips serve the same function with Gel, air, foam or rubber dampers in the grips