I did my best on this one, everyone! "Custom ship builder pack" is easier said than done, at least in a way that allows for a lot of actual customization. I believe I've struck a good compromise between way-too-complex and is-this-really-customization.
The important assets are a mixture of hull railings and walls for you to shape a ship in two styles, narrow or broad. You can also further customize them by adjusting the angle of these hulls and make a wider front or back.
Besides the hull, there are a whole lot of other bits and bobs to decorate with inside and out, and tiling deck textures too. You must absolutely check out the companion guide I wrote;
How To Build Your Own Ship Map
It includes a detailed guide on how I built the example ship you see below in eight minutes (I counted) complete with video demonstrations.

The best part of making these asset packs is seeing what you all make of them, so please share them in the Community section! I can't wait to see. :)
Thanks to you, these are released under the CC BY-NC 4.0 license.
Charlie Williams
2019-04-22 15:46:55 +0000 UTCRoss from 2-Minute Tabletop
2019-04-19 01:24:11 +0000 UTCCharlie Williams
2019-04-17 16:07:54 +0000 UTCRoss from 2-Minute Tabletop
2019-04-15 02:56:09 +0000 UTCMaurice A Trejo Jr
2019-04-15 01:12:29 +0000 UTCJelle
2019-04-13 20:31:58 +0000 UTCAdam Astra
2019-04-13 15:20:09 +0000 UTCRoss from 2-Minute Tabletop
2019-04-13 15:16:24 +0000 UTCMaxime Durocher
2019-04-13 15:03:11 +0000 UTC