Any question answered...

Swapping bits from one frame to another but can't get the headset bearing cups off. Thinking it might just be easier to buy new ones and re-use the rest of the headset. Frame is a raleigh silhouette and headset is 1" threaded. Will any old 1" bearing cups be OK?

You won't be able to get cups on their own. Might as well buy a complete headset and leave the old one in the old frame.

Does the other frame have its own forks? Theres a significant chance of the old fork's steerer threads being 26tpi, in which case you would need new forks to go with the new headset.
If you are re-using the old forks, I would try again to get the old cups out.
The old steel is quite forgiving, use a long screwdriver and a hammer and dont be scared to really twat it.