Hi,
I'd be pleased to complete this task for you and would be able to do so without difficulty, since I have excellent knowledge of osCommerce with many years experience.
I am an active member (auzStar) in the osCommerce forums, where I received Member of the Month award in January 2015.
I have also created and contributed to many osCommerce add-ons and provided solutions to other forum members.
Remove unwanted countries from delivery options is something I can easily do.
Please visit my portfolio in my Freelancer profile to see some of my created add-ons.
I would appreciate the opportunity to do this task for you and ensure you that it would be completed for you adequately.
thankyou
regards
Dominic