Ithaca Gun in Upper Sandusky Ohio just sent out an email yesterday saying that the home defense model is back in stock and available. I suspect they are in high demand right now. The 37's you do find have gone up in price a lot as has all guns lately. Although not sure of in Canada.
Upper Sandusky makes a pretty decent 37 IME. I use one for clays when I feel the need for a 12 ga. and shucking shells. Got AAA wood for it too, it is one of my waterfowl guns. Grandpa's 37 duck gun was wood and steel good enough for him good enough for me.
Also have an Upper Sandusky 12 ga. Ultralight that comes in at 6 pounds. Only section of land in SD that didn't have a fence post to set the gun on LOL
Something special about the prewar 37's though. 1940 Trap with Knick rib
Have a 37 Skeet with a Knick rib but it came from the factory with a Poly on it. Picked up a 28" Knickerbocker bbl. on ebay a few years back but still haven't had it fitted. The Polychokes may be ugly but they work, and honestly like how it swings. One of these days will have the unmolested Knick bbl. fitted.
Most of my 37's are in 16 ga. as that is what I grew up with. And prefer to shoot even for clays. Bottom gun is a 16 ga. 1961 37RVD
Some didn't care for the King Ferry 37's. I never had any problem with them. KF 16 ga. English Ultralight Deluxe works just fine, grouse don't care for them so much.
Favorite 37's are pre 1955, in 16 ga. of course. They just work for me and work well.
The 20 ga. 37 Ultralights at just over 5 pounds had the Sid Bell grip caps on them. Sort of Garanimals for hunters LOL.
20 ga. UL deerslayer compared to prewar 37T 12 ga.
A couple of slugs through a 5 pound gun was enough to convince me that I didn't really ever need to do that again.
I never felt the need for a Model 12. Have an 870 somewhere around here, just because. Not really sure how many 37's I own but I am sure it is not enough of them.