Lose the chicken wings from the brake levers .. new cables and Housing new brake pads
dont over think this ..
By the way if you drop well over 100 bucks per brake (minus the levers) they both are quite good ..
But you are not going to do that ..
CLB made some nice sidepulls in the 80's.
and sold them for a Long time after
My 90's Mk2 Brompton was fitted with a, single pivot, Brake.. supplied by CLB.
I put newer Salmon Koolstop pads on it & they worked fine.