I bought my rings which are similar in size to Depo's from this seller of Aliexpress:

You will need the 145mm semi-circle rings from this kit (full circle would be too tall for housing), but you will need to put a note to the seller that you would need the full-circle 120mm rings to complete the set, so 2 of each. Fernando can confirm for sure but I believe the diameter on the Depo low beam ring is 120mm.

2013 New Design BMW E46 Non Projector 126 SMD LED Angel Eyes Ring Angel Eyes kit - Nanjing Newsun Photoelectric Co.,Ltd

__________________
2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards