Fuel gauge question

Back in.

Cluster is out of the car so I'm testing across the terminals through the back of it. Get no continuity between the prongs sticking out the back of the cluster. I do on the temp so thought perhaps the gauge is a gonner.

Have the cluster out to replace that regulator plugged into the back of it with that chip deal. Got all the bits from Radio Shack to do it, but by what I'm thinking and what has been posted so far the gauge is bad so I'll need to find another.

Sound right?

If so, anyone got a gauge that matches my dash or even a whole cluster to match that has a working petrol gauge in it?

Cheers