Chaat House makes YUMMY chaat of various types. There's samosa chaat, paapri chaat, , dhai bara chaat, mixed, chaat, YUM.
Samosa chaat/paapri chaat are the best in my opinion.
Here are a few recipe links I found for samosa chaat.
Authentic Food Delights: Chole-Samosa Chat
Indian Recipes | Samosa Chat
Taste Of India Blog Archive Samosa Chaat