I typed "hip hop cassettes" on YouTube and found this instrumental. I'm glad I did because it has such a smooth melody. The colorful blend of the piano and bass create such a resonating sound that makes you bob your head and want to spit a verse.
Cassette Dreamin' (Old School Lofi Hip Hop Instrumental Beat)
Mike Anthony, Right Beat Radio
This instrumental is featured by Mike Anthony who runs Right Beat Radio --- http://www.rightbeatradio.com. The YouTube link is http://www.youtube.com/user/RightBeatRadio
He collects, creates, and provides all types of hip hop instrumentals on his channel. Check it out! Trust me you won't be disappointed.