where can i get exchange drive shafts for my mk indy using standard sierra driveshafts

try ebay, breakers or MK themselves, they can usually get you anything you might need.

I had recon driveshafts, calipers and new disks from Kit-Fit just outside Newark.
That was back in November 2003
Don't know if they still exist but Google came up with:
www.hotfroguk.co.uk/Companies/Kit-Fit giving address & tel no.

It also came up with www.kitfit-parts.co.uk in Lincoln

HTH

Another vote for John at Kitfit,for top quality service,yes he is still trading to contact him call 01522778877.