You must be talking about CSA because CN's lobster night is Friday. I have not seen lobster on the menu any other night then Friday, so I am going to say No you won't be able to find it any other time.
Keep in mind that lobster is not as abundant as it once was in Jamaica, which is why it is now not available at all during the mating season which is in the spring.
You should give the lobster guy on the beach a try. No joke - he carries a box of steamed lobsters. Good size, $10 each. He cuts it open with his knife and we just pulled the meat out of shell. It would have been nice to have some butter, but it was quite tasty. Combine it with a couple of beach drinks and life couldn't be better!