Anyone know where I can get a pair of these? There has been nothing on ebay in he last couple of months

Caber

i've got some. make an offer?
they've got 20 years of surface rust, but still very stong, no holes (except the ones they're supposed to have)
swap for diff cover

no?

I think you will find that the Sierra back plates may well be interchangeable.

If you use Sierra backplates you'll need the handbrake cables, shoes and drums as well.