Slimlines have universal power supplies. I haven't heard of a slimline adaptor that isn't universal. Unless, the SCPH-70000 series (the first slimline model) didn't come with a SCPH-70100 adaptor.
All PlayStation 2 consoles (even the SCPH-10000) have the fast disc speed option in the OSD. So I don't really know why you need a NTSC console for this reason.
SCPH-10000 S. MINOKAMO v1.01 (Defunct)
SCPH-10000 S. KISARAZU v1.00 (faulty)
SCPH-15000 S. KOHDA (With warranty seal!) :D
DESR-5100 S. EMCS