52-5140 cards for my 4343's

I have finally bi amped my 4343's. What a difference! The 5235 crossover I bought came with 500 hz cards. They're OK but I own a set of blank cards and want to buy the components to turn them into 52-5140 cards. Can anyone steer me in the right direction as to where to buy the parts. According to the manual I need (5) .018 microfarad capacitors, metallized polyester. It doesn't give a voltage but I'm thinking about 250V. I also need (2) 27 k ohm and (3) 22 k ohm both 1/4 watt resistors. I know it's a small quantity of parts but I need a place that sells in small quantities. All help would be appreciated.