16mm shaft anvil:
https://www.aliexpress.com/item/1005006685992991.html
https://www.ebay.com/itm/235645847288
18mm shaft anvil:
currently unavailable. will post link if it comes up for sale again. The anvil was listed as "Combination 1/2" + 1/4" ANVIL for DAYI 2106 impact wrench"
Bushing 16x24x15 or 18x24x15:
https://www.aliexpress.com/item/1005004001381921.html
Washer 16x30x2mm for use with 5mm base/16mm shaft anvil
https://www.aliexpress.com/item/1005006968727390.html
Washer 16x22x1mm for use with 6mm base/16mm shaft anvil
https://www.aliexpress.com/item/1005001439060205.html
Washer 18x32x2mm for use with 5mm base/18mm shaft anvil
https://www.aliexpress.com/item/1005006968727390.html
Plastic washer for use with original metal washer.
- for 18mm shaft anvil - 28x18x2mm
- for 16mm shaft anvil - 28x16x2mm
https://www.aliexpress.com/item/1005006006266926.html
Parkside PDSSA - https://www.lidl.de/p/parkside-20-v-akku-drehschlagschrauber-pdssa-20-li-a1-1-4-ohne-akku-und-ladegeraet/p100351835
Parkside PASSK - https://www.lidl.de/p/parkside-20-v-akku-drehschlagschrauber-passk-20-li-c2-ohne-akku-und-ladegeraet/p100379116
The original tool has an anvil with a shaft diameter of 14mm, height of the base of 5mm and a washer between the casing and base of anvil with a height of 2mm. Thus the base of the anvil and washer need to have a total height of 7mm.
You can achieve these 7mm by going for an anvil with a 5mm base height and a 2mm washer or by going for an anvil with a 6mm base height and a washer with a 1mm height. Please be aware all anvils used in this video have a hole at the bottom that has a diameter equal to 8mm, which is the same size as the original.
I would reccomend you go for an idea that is as close as possible to the original. That means an anvil that either comes with a 5mm base height or is ground down to a 5mm base height. You keep the original washer and then in that you place a plastic washer to suit your anvil. All links are provided above.
These are some of your options:
1. Anvil with a 16mm shaft which comes with a base height of 6mm. You remove 1mm off the base so it is equal to the original at 5mm. You use the original metal washer and the plastic washer (28x16x2mm) from the links provided above. You also need a new bushing, in this case 16x24x15. Again link provided above.
2. Anvil with a 16mm shaft which comes with a base height of 6mm. You leave it at a 6mm base height and get a washer that has a 1mm height - link provided above. You also need a new bushing, in this case 16x24x15. Again link provided above.
3. As used in the video, the rare 18mm shaft anvil with 8mm hole at the bottom and a base height of 5mm. You use the original metal washer and the plastic washer (28x18x2mm) from the links provided above. You also need a new bushing, in this case 18x24x15. Again link provided above.
Link to conversion with 16mm anvil: https://youtube.com/shorts/5t7okbpp0xk