IRD file not available on website listed in Quickstart

So I plan on buying the Japanese version of the Sly Collection, especially now that it works better with the latest build.

However, the IRD website listed in the Quickstart Guide doesn't have this game in its database.  How would I go about getting one for it?

You would need extra hardware. I recommend dumping through a console, as that doesn't require IRD.

This game is disc-only. I also don't have a modded PS3 or one I could mod. The last one I had died, and I prefer to keep my new slim PS3 unmodded. Too much of a bricking risk, and the only modding option for slims is something over the internet.

I actually might have the IRD for it already, I just don't know the region code (BLJS-XXXXX). I just needed to know another way just in case I don't have it.