Is there a source other than eBay for new 144BCD chainrings. I need a pair (52-42) to refurbish a bicycle...bringing it back to a top state of functionality. The crank is a Sugino GLP. Any brand of aluminum chainring will do, so long as they fit...it is not a fancy bike (Cannondale 400) so I'm not concerned about replacing with period correct parts. I usually post a picture for your troubles, but in this case there's really nothing special to see. Any advice greatly appreciated.