Building - where to get tubes...

Hey guys - I'm going to try and build a BNVD 1431 - see: https://www.thefirearmblog.com/blog/2019/11/15/friday-night-lights-bnvd-1431-review-a-pvs-31-with-pvs-14-optics/

I'd like to find some tubes but it seems like it may be just as cost-effective to buy 2 x PVS-14s and then use their parts to build it. Anyone have any links / discounts to get 10160 or 11769 tubes for way less than $1700 each? 117