I live in Ontario too, same as Mister Cairo, and I've never had a problem with moths. I've only rarely come across used coats with moth damage, and then only small bites to the nap. It must not be a "thing" here, for whatever reasons.
I've got one of those too, formerly from a WO2 in "2nd company", which I've worn a few times on my walks. The buttons are Grenadier Guards. I kept the buttons but then I'm not in England so nobody knows or cares. I agree the length is great and it's very well made, although mine has a few minor flaws like a worn-out spot under the left arm where the pace stick was held and "shadows" on the sleeves just above the cuffs where the WO2 badges were removed.
So many stories about the original. I recall reading there were three used for filming, so one is auctioned, one perhaps presented, one, who knows???
There was also a story, which I think I posted here, that Chris Evans, that obnoxious British tv presenter, had bought the coat and then destroyed it when he crashed his motorcycle or something. I doubt, given the low budget of the film, that there was more than one coat; it's not like they had to keep the coat pristine, or age it for various scenes, or have coats for stuntmen to use, all of which are reasons for having multiple costumes; so I'd be willing to bet there was only one coat. I've found that film and tv production people rarely remember correctly what they did for a film, certainly not with the clarity or precision that fans expect; for production people it's just a job, they do it, they get paid, they go home or on to the next film.
Alden 403 Moc Toe Boot - Brown Chromexcel - $680 The classic "Indy" style Alden Boot in the classic Horween brown Chromexcel. 
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Himel Bros. - The Ross Mk. 1 Leather Jacket Classic D-pocket motorcycle/aviator style jacket.
