Jason, mentioned above ^^^, works at Chandler in Central and I've been seeing him for years. He doesn't really do extensions himself, but refers you to their extension specialist - Joey Li. She's a really sweet, young, Chinese girl who is quite talkative and smiley! Her English is quite good and she understood everything I needed.
She does 3 types of extensions glue-in, sew-in and clip-in. I'm not quite sure how much the glue-ins are but everything is done by quotation.
Originally I had the sew-ins done with her, but had to take them out after 2 months because I just got sick of them, which is my own fault! They cost me about $6k with colour and cut included.
I have had a set of clip-ins made by her that cost me around $5,000 (made up of 4 pieces) and she coloured them to match my highlights. The whole salon was really professional, gave me a complimentary blowdry and sent a really lovely follow up email.
I recommend seeing Joey at Chandler! They were really great with email correspondence:
info@salonchandler.com