Where to purchase obscure chainrings??

I'm fixing a friends messed up city bike. I need to purchase a 38tooth(or thereabouts) 5 hole chainring, with 74mm BCD.

I can't seem to find anything on ebay or the other usual sites.

Is there a secret wholesale market out there in the murky depths of web land to find less common kit like this.

I could just by a new triple or double chainring set - but he's poor and doesn't wanna spend any money etc etc....

Thanks.

Spa Cycles and SJS are my first ports of call for obscure sized chainrings.

I think 36t is the biggest you'll find with that BCD. Spa Cycles sells them in that size.

Stronglight made a 38T chainring in 74mm BCD, this was predominantly to make a half step triple for the Mavic 631 'starfish' racing cranks. I had two new ones but sold them on ebay about 3 years ago for peanuts.
Tbh you would be really hard pressed to find another 38 but keep an eye out on ebay.fr. just type in 74mm and 38 obviously plus from the drop down search options to include description (Titre et description)
You might also want to have a look on some of the French cycling forums using .fr in the search function on google plus choose French as the language
HTH