No question they are the wrong thing. At $20 worth
returning for a credit or refund. The smallest DGS thermistors
I have seen are dime sized used from the 70's up.
On a thermistor you can solder the lead back on in a pinch
& it will last a long time. I assume its the thermistor in your pix ?
The VDR is what burns. Workman used to sell the pair, IIRC
FR922. Ive seen them on e-bay but at a criminal price in the
$20 range. Almost any old set can be a donor for what you need.
73 Zeno