(a) Go to your nearby Indian store for pepper.

https://www.nonnabox.com/types-of-pepper/ is a short read on the different varieties of pepper in the market. Or if you prefer a different source, https://www.seriouseats.com/guide-to-pepper-varieties

The Telicherry is the same variety as the Malabar pepper, differing in size (which also results in a somewhat lower heat and more aromatics).

If you want something interestingly different, long pepper is a great option (Use a coffee grinder to grind this, rather than a regular pepper grinder. I am guessing you don't have a good spice grinder at home from your question).