I'm pretty sure that Jim knows the answer, but whether he's got the time to visit the forum is another matter.
So I will try to help you out as good as I can.
First we take a look at that bridge in the catalogue:
http://www.ibanez.ru/info/catalog/1995/09.jpgWell, I recognize that bridge. It is on my two Aria TA-61 guitars, which were made in Korea too, I think by Samick, just like your Ghostrider. The parts are also gold-plated.
So, I'll open a case to see how these saddles look like...
Well, to be honest, they don't look like any of the GraphTech saddles I see available in this webshop:
http://www.wdmusic.com/graph_tech_nuts_13502_ctg.htmThe top end of the saddles you need are quite narrow and tapered. I don't see that on any of the GraphTech saddles. Then the shafts are quite long, because these bridge slots have no bottom. So they go all the way down. Now, what's important, is that the hole should be on such a hight, that the edges of the saddle rest precisely on the metal of the bridge, when the adjustment screw is sticking through that hole, and there should also be enough space, to place these saddles next to each other.
I found this catalogue with the available saddles pictured individually:
http://www.graphtech.com/downloads/stringsaver/stringsaver_catalog.pdfAnd although none of them is as tapered as the ones that are in my Aria bridge, the one that comes closest, is the PS-8615-00 (for Epiphone II).
Another option would be the blanks PS-8550-00 (need to be drilled and tapped, which is not without risk of breaking the saddle).
These saddles are not easy to replace. If you're lucky these PS-8615-00 will fit. I'd recommend to take measurements and/or take the bridge with you to a guitar shop (GraphTech dealer). Take one saddle out and lay them on the GraphTech saddle to compare width, hight, hole position. Maybe they will try, whether the new one fits into your bridge.
Actually, now I looked at your question, I'm glad I haven't had broken saddles on my Arias yet. I guess that ordering a new bridge through Aria is perhaps the easiest way to solve such a problem. But GraphTechs are really nice. I have at least 3 axes with GraphTech String Saver saddles: one Strat, one Epi Les Paul and one '78er Gibson The Paul that bought with damaged saddles. And I have one spare saddle for a 6 saddle telecaster from an incomplete set of someone who plays Keith's style I guess.
Ginger