As with most commodity PCB components, LCSC is a good place to find cheap connectors if you want to buy more than 10 pcs or so (due to the shipping fees).
These are listed in AC/DC power connectors. In order to find them quickly, select the Package=Plugin filter and select In Stock and then sort by price (ascending).
Using this method, you can easily find parts such as:
- HCTL HC-DC-005-2.0T (
0.0315€/pc@ 100pcs) - SHOU HAN DC005 (
0.0316€/pc@ 100pcs)
Keep in mind that these are not 100% the same regarding their geometry, so always check in the datasheet if they fit your footprint.