a dedomed xpe is about 50 mm in the 1.99 wallbuys zoomies at a meter and a dedomed sk68 xre is bigger but still smaller than your 7cm x7cm requirement at a meter .
https://budgetlightforum.com/t/-/21936?page=1
http://www.banggood.com/CREE-XPE-Q5-600-Lumen-7W-Zoomable-LED-Flashlight-1x14500-p-907006.html
also all over ebay and all over the forum in the cheap cheap lights threads .
2 ~ 4$