I purchased mine on eBay. They come in several lowering sizes. 40-50mm is too low without hitting kickstand when you flip it up. The 25 mm fits perfect and you can adjust a little. You’ll see in description. Different color pegs AND brackets. Look carefully at selection. You can probably find elsewhere too. Mine came from Hong Kong. I ordered two sets at different times. They both arrived within 5 days. Pretty fast in my opinion to travel from there, go thru customs at both ends, and have USPS deliver. (I enjoyed tracking it
Here is a pic from EBAY for your “link”