Aftermarket parking sensors

[jimbop1]

Does anybody know of any very good aftermarket, rear parking sensors? They would be for a 61 plate MINI.
MINI themselves sell them for quite a good price but labour costs are astonishing.

Any help would be much appreciated!!

[jimbop1]

SSBB said:

Be prepared for a deluge of comments asking why you need parking sensors in a MINI.

Because they are for my mum. Anything that helps an older woman driver to park is always a good thing