Nozzles, you can use pretty much every nozzle there is for 1.75. as long as it's compatible with e3d v6 systems because of the M6 "threaded" lenght and you can get theme everywhere.
Heatblock, is like olsson block, but for 1.75mm (found on ali)
Heat-throat, colling fins/heatsink and push-fittings: has to be ordered from taobao, it's realy a custom made peace i never seen before.
Had a look at one on Ali, not the same. the ones used here got "push-fitting" in the top for bowden tube and don't think the ones from UM3 will fit here.
Have a 2x set on order now, realy looking forward to build this print head.