They don't look 'fixed' to me, in that photo. I could work a pair of needle nose on those and pry one apart, carefully. Where there's a will there's a way even if I can't find a quick work-around to my problem.
There's probably some wholesalers and distributors that don't always deal with the public that have a stock of these 'tab's. Unless you own a business? It might be difficult to gain access to parts like that, but would also have to buy in bulk.
I would have to spend more time to research where to find a source just these parts it might not always be the case that parts like this are sold directly to the public.
You might have to phone a factory in Japan, ask for a free sample or something, I don't know haha! I'm just throwing out ideas.
(That is all just my own speculation of course.)
Someone might come along and happen to have some 'tabs' they would send you, hopefully.