Well, they says "custom ISO", so I'd prefer original, if it's possible. It's 174Mb, if link can be believed, and OG is only 89. Better than nothing, of course.
Update:
False alarm, it seems. I found the disc that seemingly match the description (and it's
there), but it's custom-made too. Moreover, it's exactly the same as OG ISO, only doubled with full OG archive (byte matched) and some iPad version. So not needed.
OG version is here.