I don’t sell accessories myself, just radios and the holders that I make. But I am often asked for recommendations. There are many speaker/mics on the market. Almost all of the mics online that purport to be from Baofeng are a pile of rubbish, many of them are fake.
However Retevis make a decent quality mic for your radio so I have included a link here for you. If you buy using this link, I get a couple of pennies for it but I wouldn’t recommend them if they weren’t any good.