There was Cornerstone (defunct) and Vtrader (sold). AFAIK there are no US shops that allow you to trade in the JBO as a K-1.
Cutler Group, LP is specific for US Equity Options Trading. They do provide a K1 to their limited partners.
Do you have a portfolio margin account? If not, how about options on futures where you get span margin? If none of those options work, there are lots of prop firms that trade options, just not under the old professional customer model. I know a few JBO's still around but they are going to ask you for 100k. I have no idea what you are looking to do or what your background is so I'm just throwing out very broad solutions.
I'm looking for a prop firm that allows options as well. Seems like you have to buy the learning material with Maverick.
Yes. They have a train-to-trade model and clear thru IBKR. Why don't you tell Maverick74 ( no relation), your experience and your needs. He has a lot of experience in the business.