Not got one here and can't rule out those pictures (which are compressed as anything) being an especially good sample or hand finished (did not look to be but at the same time I can fake it such that I will need a microscope to tell for a lot of errors, never mind in an image that is kicking it like it is 2002) but generally clearer rigid plastics are harder to do well. Injection locations look well picked and done well, there don't appear to be any plastic meeting lines (in clear stuff it looks usually sort of milky or foggy, or you can search for plastic weld lines/knit lines), sharp edges around port holes appear OK, alignment of parts looks good, and what I can make out of the text has it looking OK too. I can't rule out tolerances being off, the feel of the springs, the feel of it in general and other stuff. Looks like threads are in plastic rather than metal inserts but for something this size and likely level of abuse it is acceptable. I could pull apart mine and try to see if they made their own, had a mould or copied one but I will skip it for now.
To that end you might have to come back and tell us what the final result is. With all the provisos above there are no immediate reg flags for me. Third party replacements from China have a massively variable history, usually ranging from perfectly acceptable to case study in awful, so I am always wary but I dare say seeing those images above then if I needed a replacement then I would drop my own money on it.
