Your 2000 2.5L came with an AX-5 transmission, not an NV3500. Jeeps never came with an NV3500 but in 2000 the 4.0L TJ got the 5-speed NV3550 in place of the older AX-15 for several years until it got the 6-speed.
I'd go right to www.dialaclutch.com/
for a replacement clutch kit, get the standard (not Gold!) Luk brand kit which includes the clutch disk, pressure plate, throwout bearing, pilot bearing and pilot shaft for $130-140. And your TJ has an external slave cylinder.