Taylor Guitars is a top US Guitar maker that doesn't include Ukuleles in the regular catalogue. However in 2011 they built a limited number, (40), of Koa Tenor Ukuleles that they marketed as a set with a matched Guitar in the limited edition premium "Builders Reserve Series IV" range. They did this again in 2012 with the "Builders Reserve Series VII" range, only this time with 50 Mahogany Tenors. 

It is possible they will do it again on future "Builders Reserve" sets and their website also suggests they have made some one off custom Ukuleles for people too?