Would anyone know about any less expensive dust ejector valves for the exmark air filter canisters? I thought that maybe a Toro or other crossover might work for less money. Did some research on line, but found nothing. The going price seems to be around 12.00. Bought my EFI machine new in 2004, model# 406362. My brother also has the same machine, and I sold my second machine to a friend back in March, so I thought I'd check for all of us. Any info much appreciated.