Where on E-Bay?
I had someone who knew what they were doing help me, but it was not hard at all. 6 screws hold the dash cover on, 5 hold the guage assembly in, plastic cover snaps off. The hard part was finding the right wire to tap into...
Thing to be careful of is not to pull the needles off, just fit the guages over the needle and line them up.
I have the B & M.