For mounting the Budaschnozzle you will need 3 @ 2.5" long 6-32 screws, w/ nylon lock nuts. And threaded 6-32 spacers, 1.5" long for each screw. Larger than 0.25" diameter standoffs may cause interferance with the Budaschnozzle.
For the fan mount you will need a 25mm x 25mm fan and #3 wood screws. Do not use a fan thicker than 10mm. Otherwise it will cause interferance with the delta arms. If using a 10mm wide fan, I recommend cutting away the bottom two corners to clear the delta arms at extreme outer moves. A 5mm wide fan should be the best size for Delta arm clearance, and should provide plenty of cooling air for the transition zone.