WTB: Wide/narrow chainring, clutch rear der.

130 BCD, ~42T for the ring; 10-speed SRAM or Shimano for the derailleur.

I'd also be willing to consider a pair of inexpensive cranks, preferably 172.5mm, if you have the chainring but it's not 130 BCD.

Please let me know off-list what you have. Thanks.

Eric