I took a little break from the SC for a few weeks, but had been looking for the entire wiring harness for the drivers side. I messaged a seller that had Lexus parts for sale to see if they had just the blue piece. Of course he said no, they don't carry just that piece, that I would have to get the whole wiring harness. Then he said that the part had been discontinued. I found a few on eBay, with one being $30, but they had a difference in part number. The part number for my 94 is 82152-24152, but what was listed was 82152-24153. I messaged the seller to see if they were interchangeable even though it says it's compatible (Lexuspartsnow says otherwise, so does the dealer I called today), but I haven't got an answer yet.
I ended up calling a local dealer to see if they are indeed interchangeable, and the guy said it doesn't say why they were different, but he didn't think they are interchangeable. He told me to look at the blue piece to see if there was a number on there, and sure enough there is. There's a 5 digit number on the top, where the wires enter, 10803. It came up as a piece sold separately, only $10. He put the order in, and it should be there in a couple days. That's a relief, because I didn't want to replace the whole wiring harness or solder lol.