While I know that this is not specifically what you asked for (i.e. painting of existing calipers), I've also got a 100D on order and I also wanted the same look as you. What I've been considering doing, instead of painting the original calipers, is buying caliper covers. Supposedly a caliper cover will also protect the wheel from brake dust and reduce caliper operating temperature. CARiD says they will create custom caliper covers with any logo you want on them. Here's the link I bookmarked for ordering after I receive my MS:
MGP® 56003SCUSDF - Custom Caliper Covers (Full Kit, 4 pcs)
Alternatively, we might be able to negotiate with Renewz to give a better price if we offer two guaranteed jobs. Sometimes that can work. DM me if you want to pursue that option. I live in North Van so I'm down with that. One question would be whether they are simply painting over top or doing a full power coating which will last longer, from my research.