If it's for the sliding side windows, I think you need to order letter M.
https://www.mcmaster.com/#catalog/120/2928/=ugn4bu
or
https://www.ebay.com/itm/OEM-73-87-...803097?hash=item33e4f83219:g:knsAAOSwqYdZgPbf
I purchased my K5 online and it was supposed to be a VG condition, rust free truck and has been a nightmare! I'll never buy a vehicle sight unseen again!

No problem and much appreciated. I am trying to keep mine period correct on the inside as much as possible. There has to be guys on CK5 with a few old-style non-locking consoles laying around. But, seriously, that was a very kind offer.1975Jimmy, The comment about the comment about finding the console after the NY piece (which I've deleted since posting.), I didn't look before responding. Was thinking I was talking to wheels87k5. Obviously, you need a very early latch assembly. Let me know if you can convert yours over or need the whole console (if you can't find your latch.) I'll try to help in any way I can.
awesome. thanks for the SouthCo info.You know, you can actually buy the original ones still. I got super lucky and called a local industrial parts supply place that stocked them, told them that i was restoring a K5 Blazer and the dude said he'd just send me two "sample units" for the shipping cost.
But, for your reference, you can buy the factory original units right here: https://www.biscoind.com/Southco/07-10-201-12. If you remove your broken original off the window, it should say SouthCo on the back side, at least mine did. The part number is SouthCo 07-10-201-12.
It would be great to have a group buy together for those that need them, because the volume discount is huge!
Now if only i can find the damn rolling latch for the early style center console I'd be set! It almost looks like a small rolling latch for a closet door, but I cant find that piece anywhere!