Yeah, I hear ya there!
Buddy just bought the turn signal and tail light sockets a month or so ago. I thought it was from Tom's, but he's been buying from BCB and Tom's a lot lately, so could be either one.
In both cases though, you only get the actual socket and wires. You would have to remove the existing ones from the housing. Which, it turned out in his case, was a no-brainer since the originals actually fell out during disassembly! Oh well.
I put them back in, but they didn't go in as nicely as I thought they would. They were sized perfectly of course, but the originals must've been partially soldered or something, since the new ones didn't have near the "press-fit" feel, once the originals came out.
For the tail lights, we ended up using a socket and a hammer to gently re-form the housing down to a tighter fit, then gave them a couple of quick MIG tack welds.
VERY CAREFULLY of course!!!
Paul