I'm using a pair of 5.11 boots (don't remember the exact model) that I got from work and covering them up with some leather gaiters. Seems to be a better option according to most that I've talked to.
Those boots are perfect. but i cant seem to find the correct gaiters...or anything close at all...the swiss leather gaiters seem to only go shin high. The movie one s seem to go up to the base of the knee.
Which, if you look at the Hot Toys boots for the Stealth Suit, are exactly the basis for the boot. The sole is an exact match. The top was clearly modified by production.