Well you can buy it all from Sony (nextronics) or search on eBay. I have a few from TR’s I’ve broken for parts, but being UK based, unless you are too exchange rates may make it to costly when also factoring in shipping…..
I’ll take some images later of both sets of HDD mounting hardware..
*EDIT*
(I’ve re read you post and I’m now unsure of your question.)
If I’ve been unclear I’ll try to clarify now.
Most if not all early TR series (TR1mp and TR1 versions for other regions came with the Hitachi drive that has a pins in side connection and two brackets that fix to the HDD with four screws. Most later TR’s especially those with 40gb and above came with Toshiba Drive that has an end socket. The drive cage holds the HDD in place and it is located by four rubber corners, see my previous images in this thread for more details. (at least this is my experience so far with UK spec TR’s)
Any TR will take either drive but you need the connector, and assuming you want it mounted correctly the cradle for the specific drive.
If you want to fit a Samsung SSD hdd then you need the Toshiba connector and mounting hardware, (assuming you don’t want it loose)
you can check the bios or windows to see which drive type you have