That's what I did, and it didn't work right, it wouldn't keep correct tension on the verge no matter how much I bent it, and the more I bent it, the closer it came to breaking until it finally broke at that the spot between where the fat part met up with the round shaft.Bend the horizontal part (the part that reaches over to the verge pin) so that it for an angle less than 90 degrees with the vertical part. Press the vertical part into the hole until the tension opens the angle to about 90 degrees. The tension should keep it in place. If not, I suspect one of two things: 1) the hole is either too large or has been wallowed out so the hole is not a uniform diameter for the entire thickness of the plate or, 2) your replacement part is made from some crappy soft steel that bends too easily instead of maintaining tension.
So I have a feeling (and I believe I mentioned this already in a previous post) that these replacement verge retainers are indeed made of some sort of crappy metal that bends and breaks too easily just like you said.
I will try Merritt's or Clockworks to see what they have (it seems that Timesavers doesn't do a very good job at keeping things in stock, as that's the second item I tried ordering from them for my clock that they were out of and had a long waiting time for when they would get the parts in, I first tried ordering some dust caps for my clock's weight pulleys which the originals were missing on mine, and those they said they were out of and had a 6 month wait on those, and then I tried to order the OG Style Hands from them and they said there was a 6-8 week wait on those to come in.)Look carefully in your packing, these typically come with two different size bushing/sleeves. I think a lot of this stuff comes from India and is pretty awful to begin with. If Timesavers does not have the hand set you need you might try Merritt's or one of the other sources, or even eBay where you might find an old original set with the bushing already installed.