Engine/Transmission (1998.5 - 2002) feed up with NV5600 help!

[V-Metalworx]

well I'm won of the lucky people to have a early 2000 truck with the 1. 25 imput shaft transmission witch worked ok but it had a grinding problem in shifting into 5th and 6th not bad but enough to bother me so last fall after blowing out the clutch and pressure truck pulling I decided to put in new sycro's guess what you can't get them for the early 6spd with out changing abunch of the gears and the input shaft witch I planned on changing anyway so far I've found one supplier that has parts and for everything new including all the gears and bearings and sycro's I'll have over two grand in parts and my labor to rebuild it one transmission shop said they would exchange mine for the newer one for 1950. but I won't know what I'm getting does any one know of any one else that sell's NV5600 transmission parts are all parts the same or is their generac stuff to look out for any info will be helpfull also has anyone tried the new Zoom ZVT clutch