I would check out E - bay & see what you can find on there for a 212 clone ect.
That Tilly in your pic,, is not a 225 or 212R anyway.
It's more or less a stock 212 clone with the governor removed, & still has a cast fly wheel also, & no valve train upgrades.
I put one of those on my Buddies bike.
Honestly, I am not real impressed with that engine, for what it costs.
The ''over all'' tolerances on my Buddies,, are pretty loose.
Crank end play ect. is not to my liking either.
I generally see better tolerances on the inexpensive Predators.
If it was me,, I would just see if you could stumble across a used GX-200 Honda, out of like a press washer ect.. That's what I did.
Those engines will pretty much run forever, even beating the living crap out of em.
Pretty sure you ought to be able to find one of those, or a 212 clone,, in the used or new classifieds, Face book market place,, ect. ect..
Not sure if you have Craigslist up there ?
There's always good deals on that, especially in the farm & garden sections.
My 2 cents.