AFAIK the Interceptor OTV is an export restricted item and has no distribution outside of the US. I've had a hell of a time getting parts for mine.
SDS does make a replacement cover (along with the throat and groing protector), I think Paraclete makes a set too, and Propper makes the new IBA2 cover (more PALS strips). The cover isn't export restricted and can probably be ordered directly from SDS or other manufacturer. You will be missing the yoke/collar however, if you plan on using the full setup; there's no replacement cover for that, you need to get the whole part.
The only way to obtain the armor part (such as the collar) legally is to get a surplused/expired one; body armor is considered to have a five (5) year serviceable lifespan (assuming it hasnt taken a hit), after which it's discarded. Since the US Army is phasing out woodland and tri-color for ACU and the Marines for Coyote Brown, older Woodland/tricolor parts (2001 and prior) get surplused.
If you're getting the covers, you can stuff them yourself with a stifferener to simulate plates. (what you use depends on how realistic you want it to look) Refer to the Over There TV show (now cancelled); they used empty carriers with a thin stiffener in the back plate pocket (maybe the front too, hard to tell).
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