Paul,
That looks a lot like a Huan Yang product, which might explain the HY part number! I bought mine on AliExpress from the Huan Yang Drive shop nearly 3 years ago and have had no problems. Bought as a pair the drive was pre-configured for the spindle. Obvioulsy there may be delivery delay differences and a very different level of after-sales support than you will get from a local supplier, but it might be interesting to compare their prices. Note that the mounting was not included in the price shown.

This link is taken from my order record on AliExpress.

https://www.aliexpress.com/item/9050...78de4c4dP6Q16L

Kit