I do not believe this "Hemi" head design was created exclusively for Harbor Freight. There should be other models out there with this head.
I am reasonably sure its a Loncin motor....
The first 212 I saw predated the Predator by about a full year on a Princess Auto presure washer and later a trash pump sold under the powerfist store brand.
But this never transferred over to the regular powerfist line and to this day they are still selling the old stand by Black Lifan 196 Clone.
The new 210FA has shown up in Canada too!
Its stuck on a Speedco wood splitter however, good luck trying to peel that off without the rest of the machine.
The older 212 is now a regular stock item at Tool town.
No deals there however, but at least its significantly better than the old stock Waspe Blue clones they have been trying to unload ( some dated as old as 2006 ).
If you live in Canada save yourself some heart break, avoid the waspe ( weak cranks and cams machined by a beaver ).
The PE 210 from Tool town is actually the same as the old predator, and older powerfist 212 on the pumps and pressure washers ( like princess auto they seem to think its a 210cc and not 212 so the supplier is probably the same place in China ).
Good build quality on the engine just like the old predator just different plastic for the Canadian market and a $199.00 price to choke on.
Better to wait for the black powerfist clones at the side walk sale for 100 bucks or keep your wallet in your pocket until someone blinks and hopeful restocks on the 210FA
Now if you are really desperate and are willing to buy a few blocks and heads.
welfare-international.com
They can supply the engine components directly from China.
But it won't be cheap....