Marstar still had magazines in May. The strippers are a bit of a pain to find but they are out there - I found 50 at the local gun show last year. Slings and cleaning kits can be an adventure but they can be shipped from the US for not too much money.
You'll want the extra mags. I found the stripper set up on the VZ a little awkward to use - the stripper doesn't feed straight down like on an SKS and it takes more force to get the rounds strip into the magazine.
Magazines are either welded with a pin (gives new meaning to frankenpinned) or riveted. The riveted ones can be massaged or re-riveted if the mag is too tight to take the last round off the stripper. If the mag is welded and won't take the fifth round, you're stuck with it as the pin is welded to the tab that would normally allow you to disassemble the magazine.
A fun stop between the SKS and the 858. Or an XCR if you swing that way