There is no such thing as a "Mac hard drive", you can use any 2.5" S-ATA drive with a maximum height of 9.5 mm or 12.5 mm, depending on your MacBook model.
Actually there are mac hard drives. On the logo there is an apple logo. Although they do not manufacturer their own, mac hard drives come with sudden motion sensors and are quieter than the cheapo hard drives. But they don't sell them directly to consumers.
To answer your question, you can get an SATA hard drive that has a 2.5 inch platter and stick with 9.5 mm height or less. SSD's are even more tricky because TRIM isn't enabled by default but can be fixed with a software plugin.
Actually there are mac hard drives. On the logo there is an apple logo. Although they do not manufacturer their own, mac hard drives come with sudden motion sensors and are quieter than the cheapo hard drives. But they don't sell them directly to consumers.
Do you mean the Toshiba and Seagte drives Apple uses with their own sticker on them? And the SuddenMotionSensor is not built into those drives, it is built into the logic board.
Out of curiosity, has anyone ever experienced the activation of the sudden motion sensor? It sounds potentially useful judging by the links you posted, especially for a laptop, but I'm wondering if it really works.
The difference between 'Apple' HDDs and normal HDDs is that Apple ones might have a custom firmware. Although, nobody knows what (and if) special features such firmware has. Anyway, even without Apple firmware the drive will work jut fine in your laptop.