Fast Bus? 17.5" Drive shafts for 930 CV joints

I have a pair of NEW drive shafts, that were incorrectly supplied to me by a US supplier so it is a bit expensive to send them back, as I am in the UK.

The drive shafts are Empi part no 16-2225-0, supplied by Rancho so I presume they must be good enough for the job.
They are 17.5" long IRS drive shafts 28 spline to take Porsche 930 CV joints. I bought these for a 'Bus Boys' type 1 IRS into a split bus, conversion. I needed the standard VW spline versions.

I really need the correct versions for a standard VW spline fitment so would do a straight swap for new drive shafts,
otherwise I am looking for £150 ono

I can bring them to EBI so long as I have a deposit.