If I decide to go with a Dyno-Hub, I'm wondering what a good and cost effective way would be to go about it. Should I get a custom rim built around one, or see if I can find a place to use my current rim to build one?

My bike is a 2016 Novara - Safari, and the rims are 36h Alex ATD 470.

What are some businesses where I can either get my current rim fitted with one, or get a rim built around one at a reasonable price, and with good quality and a good reputation?