Seeking Advice:

I'm not really that great with computers so I hired a web developer to design and build my site www.takeone.ie
Im really happy with the way the site looks and as the site has only been live 2 months Im coming up with new ideas to improve the site and the business.
However, my web developer is becoming extremely slow and I find it very hard to get in touch with him as he has moved to Sri Lanka so everything is taking so much longer.
My questions is that if I was to seek an Irish based web developer would they be able to integrate new functions onto the existing site or would it be very hard as it has been built by someone else?

Would really appreciate any advice...

Thanks