Iām not sure what you mean by āpositionsā, but if what you need is to find the items you listed on the website I can help you out with that!
Could you please tell me on which RobotShop platform you plan to buy the products? By this I mean the following options: United States | Canada | France | United Kingdom | Germany | Spain | Europe | Japan, that way I can check if the items are available in the store you are going to use.
I searched in the United States platform and found these:
I wasnāt able to find the HPS-3D320-S (USART) but I found this one
Nor the PMW3901 Optical Flow Sensor Designed by Pesky Products, but maybe you could be interested in this one:
I checked here on RobotShop and on the manufacturerās website and there is no USART interface Hypersen LiDAR. I also checked a few models from other brands on the LIDAR, Laser Scanners & Rangefinders section and I couldnāt find one that uses USART but maybe you want to give it a look yourself