Hello Rick - is your '07 MINI a Cooper or Cooper S? Can you give me the last 7 digits of your vin by chance?
The coolant hose that mounts to the bottom of the expansion tank and runs towards the thermostat housing is here -
Coolant Hose 17122754573 - Genuine MINI - BMW - 17-12-2-754-573 | Pelican Parts. Let me know if you need a different part.