Thanks Shvegel, I have ordered a pair of these from the ebay seller. He is dropping them off to my guys in Michigan today all being well.
The annoying thing is I have already ordered a pair of the repair sections from SLS, these were supposed to be delivered last week but UPS damaged the parcels and returned them to Germany before they even got to me so I still haven't seen them. I got an email from SLS saying they would send them out again but I don't think they have as yet. I am reluctant to cancel them in case there is a problem with these ones so it looks like I may soon have rockers coming out my ears...
These complete repair pieces will make life easier in the long run even though I don't plan on using the whole thing, just a portion of it, but all my jacking points need just a little bit of repair so if I can do the whole job with the new ones already installed I think that will be better, guess I can always resell the SLS ones. Using genuine MB is infinitely preferable and these are working out around half price so that is OK, at £400 each it was a bridge too far for the corrosion I have.