Looking for Goat Meat
I bought some goat loin chops at Salt and Time a couple of weeks ago. They were, IMO, very expensive, about on the order of Central Market loin lamb chops or maybe a bit more. For that reason, they are not going to be a staple on my table. That said, I left them with a little red wine, EVOO, garlic and rosemary for a while and grilled them. They were very good eating. It has been a while since I had cabrito. If tasted blind I would have known that it was not beef or lamb but it might have taken a while to decide on goat. For the number of people you mentioned, I would go for a whole young goat and grill/roast it over wood/charcoal.
World Food Halal Market at Lamar and Rutland (NW Corner) and Madina Halal Market just south of Rundberg on Lamar (SW corner). The latter store has changed hands a few times but it should still be a halal market.
Sorry - no suggestions on cuts since I don't know how you plan on serving it, to who, and with what else.
The La Fiesta on 183 Ohlen had it the last time I went in. In fact, had the goat head staring right at me through the glass.
Goat is something you either like/hate (very oily). I'd figure about 1/4 - 1/3 pound per person and do a "roast" cabrito with lots of tomitillos, chili and beer. Think carne asada only with goat.