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You can try the poly boots; but I do not think they fit as well. They sit on top whereas the rubber boot goes over the metal body. So you still have the problem of grease able to leak out.
I think that all the boots will tear in a short time.
Looks like it was cut, the only other ones I would recommend is Delco's, other than Moog's and I have heard good things about them on this forum. Also, Moog's I believe carry a year warranty.
I have never known anybody to have used Raybesto's, so I cannot say.
You could try BanskiMotorsports' heim-joint kit. $250 or so IIRC, and has received a lot of praise for tightening up the slop in the suspension back there. Added bonus is there's no boot to tear. However, if you drive a lot in salted winter roads, it may not be the best decision, as heim joints don't take well to getting filthy. They do make rubber covers for them, but I'm not sure how well they work.