It seems I've put my spare parts somewhere safe. ;) I did measure the eBay parts installed in the Polaris, though... they sit about 0.225" above the top surface of the Polaris. I'm sure you could put a spacer underneath the potentiometers to raise them a bit.
Datasheet linked from the eBay page:
It looks like there's 3.5 mm solder lead length.
Harvey