We had the JDM EPC but couldn't get it to run right. Even when it ran half decently it was in Japanese. You cannot order JDM parts (even with a part number) from a US Honda dealer. The US EPC doesn't even have those part numbers on catelog because they're overseas items. The images are just all the same for all Honda EPCs.
A site that specializes in JDM parts probably. Often if they can get some things for you (say some similar products for example) then they might be able to source this for you too. Don't expect it to be cheap though.
Oh, and I'd expect it to have some of the same problems I've heard US Integra cup holders have. I know a few Hondas have these kinds of cup holders and I'm pretty sure my sister's Integra did too.
I thinkt he Integra ones sometimes stick.... Maybe ask $lick Rick or make a thread about it on ClubIntegra. I *think* third gen Integras have this kind of pop-out cup holder. $lick Rick should be able to tell you what they have (might have changed a bit mid-gen though as the exterior did).