This model rocket nose cone is a remix of the nose cone pieces of the Thunderbird 1 sci-fi rocket and is designed to fit Estes BT-60 airframe tubing.
I had to scale down the size of the pieces to 81.7% of the original.
The nose pieces are taken from Gadgetmind's Thunderbird 1 model page.
There are seven files you can download.
1 - Complete nose cone with shoulder
1 - Upper part of nose cone
1 - Lower part of nose cone
1 - Lower part of nose cone with shoulder
1 - Nose cone shoulder only
2 - End cap without and with 5.0mm hole in the center for adding an eye bolt
https://www.thingiverse.com/thing:4911637