I think to be the best candidate to create your 16 bars synth. I have a really good knowledge in sound making and sound design.
You will find examples on my Freelancer profile. I uploaded a couples of Hip-Hop instrumentals I wrote, electronic music and stuff. All the sounds you hear is 100% done by me.
I really invite you to listen to the song 'Bang La Decks - Zouka (remix)', @1:38, there is a kind of synth that I can tweak and make it really sound like your examples. I design sounds since 13 years now.
To be honnest with you, it is my first project ever on Freelancer but we all got to start somewhere.
I am very professional and confidential.
I can deliver your pack in less than one day.
It would be a pleasure for me to work with you,
Best regards,
Yan