I can't speak to the originality of those specific parts because I've never had occasion to replace them. I have however had enough experience with repop parts in general to form the opinion that 'replacement' parts are too often just something close to the original that can be made to work with enough effort. All too often it's that or do without because there's just not enough demand to warrant the expense of producing an exact replica. The unit cost would be so high that no one would buy them.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.