Radiator pipe collars

[roche81]

I have just had a new heating system installed and want to cover the radiator pipes with either a white plastic or chrome looking pipe collar. On 2 of the radiators there is a small angled (elbow) coming frm the screed, is it possible to get these collars to be flexible to cover the angle or will it be best to use a Rossetti at the bottom of the pipe to try and hide the majority of it? These collars seem a great idea but don't seem to be able to get them in anything other than straight lengths.

Any suggestions / info greatly appreciated.

Cheers