In the temporary downloads page, there wasn't a link to LL:C1. So I'm wondering if anyone archived it. Without this version, there is no Level Designer for LL:C1. I really hope someone answers back. This forum seems kinda dead.
I don't have it myself, but other people might. You could ask on the LL forums, which might be a better resource. But most people prefer C2/Null Space because it's more recent and advanced, anyway; just curious, why do you want the C1 level designer?
Oh, that's cool. The game without the LD is hosted on Newgrounds here, and you could rip the .swf file directly from that page (that's basically what I did for the SM63 LD) if you just want the standalone game. But I can't help you if you're looking for the LD, sorry.