They seem to be all thats available right now in 8.44. The only issue is, the spline gears were not machined correctly. Its the same problem itzmepete reported a while back with some Taiwanese gears. They look like this (ASN on the left, stock on the right):
Instead of teeth, it has grooves. Is this a problem or nothing to worry about?
I would be concerned too, since those splines are what transfer all your force onto the next gear.
I would try to pull your gear cover off and see how the ASN gear fits, and if it noticeibly doesn't grab as well, no press fit so should be an easy test.