You need an axle that originally came on a Japanese market CRX SiR. If you use '90 Integra axles, you need both sides along with the Integra intermediate shaft. The Integra axles also have to be slightly modified.

If you search for a while on partstrader and the like, you can find an SiR axle. If not, I think they can be replicated with a 90-93 Integra axle and one of the 86-89 Integra CV joints.