Wanted: 11 speed compact chainset - SRAM Rival GXP / Shimano 105 etc.

Hello everyone. I need to change the gearing on my dad’s bike, I’m looking for an 11 speed 50/34t chainset. Must be black. 11 speed SRAM Rival or Shimano 105 would be ideal. Needs to fit a BSA BB (ie. not BB30 etc.) but ok if BB not included, any crank length but ideally 170mm. Even better would be a pair of SRAM 11 speed chainrings 50/34t 110 BCD - these are ruinously expensive new!

Please let me know if you have anything that might work. Thanks for looking.

Dave

Edit: now sorted. For anyone else looking for something similar, I thought this was a pretty good deal

https://www.merlincycles.com/shimano-fc-rs510-chainset-11-speed-109014.html