I'm looking for a 130BCD 46T chainring guard in silver for commuting use (just to keep grime off pants, shoelaces out of the chainring, etc). Similar parts are not uncommon as original equipment on relatively cheap bikes (and it stands to reason that a part that's effectively a chainring without teeth, and thus much more generous tolerances, would be cheaper than a chainring), but it seems like most aftermarket parts are $40+ cyclocross-oriented bashguards, often with a relatively burly look. Any suggestions?