The best replacement for cowbell is jam block.

The best alternatives to cowbell are rated as following:
★★★★★  jam block
★★★★★  drums
★★★  wood chipper
★★  bell lap
★★  cowbell
★★  cow bell

Your alternative for cowbell is not listed? Suggest!
Speaking about cowbell, one probably shouldn't forget about christopher walken.

Other search terms related to cowbell and their ratings are:
★★★★★ christopher walken
★★★★ will ferrell
You have in mind a companion for cowbell and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cowbell in all years. Click on graph for more.
cowbell
jam block
drums