Finally found at least a picture of what I'm sorta looking for (general idea if not the exact thing). Though, this adapter has 50 pins on the IDC, posts I have read say adapting it to 40-pin IDE is easy. I knew I saw it somewhere on here, turned up on page 10 of a search for 'slimline'.
Unfortunately the site that the picture is from no longer has it.
Numbers on it:
A google search turned up nothing.
If anybody knows where to get a simular adapter, LMK.