You're saying your partner is not as aroused by sex with you as you want her to be? There is no medical evidence that the O shot does much for women sexually. And I think the Mona Lisa laser treatment is more for women who have scarring in the vaginal area; i.e., to repair a medical issue, not to improve sexual response.
How has your partner responded to you implying that she could use a medical procedure so she will be more excited about sex? I heard a woman speaker give a speech about sexuality to a female audience, and it had a moment that made the whole audience laugh. She was answering a question about lack of enthusiasm or arousal in the bedroom, and she said, "It sounds like there is nothing wrong with you that a new partner wouldn't solve." Be sure, if you suggest to your girlfriend that you think she is running out of gas sexually and that it's probably so much her fault that she should get medical help, that you find a better way to say it than that. Tread lightly. You don't want her to come back with the news that you aren't an inspiring lover.