You can purchase following books.

Iqbal e Farsi written by Rasheed Bukhari. It covers a good much of syllabus: Gulistan e Saadi (CH:7 & 8), Israar e Khudi, Khataab ba Javeed and Ghazaleat e Hafiz Sharazi. Price: Rs 150, Availability: Urdu Baazar, Lahore

Kaleed e Masadar writeen by Maulvi Muhammad Abdullah. It includes Commonly used Masadar and basic grammar. Price: Rs 15, Availability: Urdu Baazar, Lahore

Gulshan e Farsi (Very important) published by Iranian cultural center.

Jadeed Kaleed e Farsi (Slightly more advance than the one mentioned above) written by Syedda Faleha Zahra Kazmi. Price 50, Availability: No Idea

Farsi Addab ke Mukhtasir tareen tarekh written by doctor Muhammad Riaz. Price 350, Availability: Urdu Baazar, Lahore.

(The above mentioned book nearly cover all the syllabus and these books are very easy to comprehend.)

Regards,
Badr.