You can consider venotrain - https://www.venotrain.co.uk/product/venotrain-micro/
I got it from a vein doctor in Singapore as he highly recommends it
I still have them in good condition. I have 2 pairs of it (Previously i have spider veins and i need to use it during my recovery stage. My veins are now almost gone and i do not need to use it anymore)
If you are keen, kindly message me at [email protected]